Publikationen

Hier finden sie die Publikationen des Arbeitskreis Niewa

Publikationen 1994 -1999

1.    H. Jacobs, R. Niewa,„Synthesis and crystal structure of a sodium nitrido tungstate(VI), Na3WN3”, Eur. J. Solid State Inorg. Chem. 31 (1994) 105.

2.    R. Niewa, H. Jacobs,„Synthesis and crystal structure of alkali metal oxo nitrido dimetallates(VI), A6[M2N4O3] (A = K, Rb, Cs; M = Mo, W)”, J. Alloys Compd. 217 (1995) 38.

3.    R. Niewa, H. Jacobs, H. M. Mayer,„Re-evaluation of the crystal structure of lithium zirconium nitride, Li2ZrN2, by neutron powder diffraction”, Z. Kristallogr. 210 (1995) 513.

4.    R. Niewa, H. Jacobs,„Crystal structure of hafnium(IV) chloride, HfCl4”, Z. Kristallogr. 210 (1995) 687.

5.    R. Niewa, H. Jacobs,„Na2K[WN3] and Na11Rb[(WN3)4], two new alkali metal nitrido tungstates(VI) with closely related structures”, J. Alloys Compd. 233 (1996) 61.

6.    R. Niewa, H. Jacobs,„Na5Rb[(WN3)2] and Na5Cs[(WN3)2], two new sodium nitrido tungstates(VI) with the heavier alkali metals rubidium and cesium”, J. Alloys Compd. 234 (1996) 171.

7.    R. Niewa, H. Jacobs,„Cs5[Na{W4N10}]: The First Framework Nitridotungstate(VI)”, Z. Anorg. Allg. Chem. 622 (1996) 881.

8.    R. Niewa, H. Jacobs,„Na2K13[W7N19] the first nitrido tungstate(VI) with layers of corner-sharing nitrogen tetrahedra around tungsten”, J. Alloys Compd. 236 (1996) 13.

9.    R. Niewa, H. Jacobs,„NaRb4[(WN2.5O0.5)2] and NaCs4[(WN2.5O0.5)2], the first oxo nitrido tungstates(VI) with infinite chains [WX2X2/22.5–] with X = N, O”, Eur. J. Solid State Inorg. Chem. 33 (1996) 463.

10.  R. Niewa, H. Jacobs,„Group V and VI Alkali Nitridometalates: A Growing Class of Compounds with Structures Related to Silicate Chemistry”, Chem. Rev. 96 (1996) 2053.

11.  Th. Sichla, R. Niewa, U. Zachwieja, R. Eßmann, H. Jacobs,„Synthesis, Crystal Structure and IR Investigations of [(NH3)5V-O-V(NH3)5]I4·NH3 and [(NH3)5Ti-O-Ti(NH3)5]I4·NH3”, Z. Anorg. Allg. Chem. 622 (1996) 2074.

12.  H. Jacobs, R. Niewa, Th. Sichla, A. Tenten, U. Zachwieja,„Metal nitrogen compounds with unusual chemical bonding: nitrides, imides, amides and ammine complexes”, J. Alloys Compd. 246 (1997) 91.

13.  D. Zellmer, R. Niewa, H. Preut, R. P. Kreher,„A Functionalized Dimethyl 1,3-Butadiene-2,3-dicarboxylate”, Acta Crystallogr. C53 (1997) 251.

14.  R. Niewa, F. J. DiSalvo, D.-K. Yang, D. B. Zax, H. Luo, W. B. Yelon,„Synthesis, crystal structure and properties of a lithium manganese nitride, (Li,Mn)2N”, J. Alloys Compd. 266 (1998) 32.

15.  R. Niewa, G. V. Vajenine, F. J. DiSalvo, H. Luo, W. B. Yelon,„Unusual Bonding in Ternary Nitrides: Preparation, Structure and Properties of Ce2MnN3”, Z. Naturforsch. 53b (1998) 63.

16.  R. Niewa, G. V. Vajenine, F. J. DiSalvo,„Synthesis and Crystal Structure of Ternary Sulfides A3MS4 with A = Na, Rb; M = Nb, Ta”, J. Solid State Chem. 139 (1998) 404.

17.  R. Niewa, F. J. DiSalvo,„Recent developments in nitride chemistry”, Chem. Mater. 10 (1998) 2733.

18.  R. Niewa, F. J. DiSalvo,„Breaking up Chains: The Nitridocuprates(I) Ba[CuN], Ba16[(CuN)8][Cu2N3][Cu3N4] and Ca4Ba[CuN2]2”, J. Alloys Compd. 279 (1998) 153.

19.  R. Stahl, R. Niewa, H. Jacobs,„Synthese und Kristallstruktur von Na2Zn(OH)4”, Z. Anorg. Allg. Chem. 625 (1999) 48.

20.  G. A. Landrum, R. Dronskowski, R. Niewa, F. J. DiSalvo,„Electronic Structure and Bonding in Ce (Nitride) Compounds:Trivalent versus Tetravalent Cerium”, Chem. Eur. J. 5 (1999) 515.

21.  D. Zellmer, R. Niewa, R. P. Kreher,„A functionalized dimethyl maleate (maleic acid dimethyl ester)”, Acta Crystallogr. C 55 (1999) 823.

22.  M. Ludwig, R. Niewa, R. Kniep,„Dimers [Al2N6]12– and Chains [AlN4/23–] in the Crystal Structures of Ca6[Al2N6] and Ba3[Al2N4]”, Z. Naturforsch. 54b (1999) 461.

Publikationen 2000 - 2010

23.  R. Niewa, H. Jacobs,„Crystal structure of  dirubidium oxodinitridotungstate(VI), Rb2[WN2O]”, Z. Kristallogr. NCS 215 (2000) 17.

24.  P. Höhn, R. Niewa, R. Kniep,„Crystal structure of tetra(calcium/strontium) cyanamide dinitride, (Ca4–xSrx)[CN2]N2 (x = 0.80)”, Z. Kristallogr. NCS  215 (2000) 323.

25.  F. Tessier, A. Navrotsky, R. Niewa, A. Leineweber, H. Jacobs, S. Kikkawa, M. Takahashi, F. Kanamaru, F. J. DiSalvo,„Energetics of binary iron nitrides”, Solid State Sci. 2 (2000) 457.

26.  A. Leineweber, R. Niewa, H. Jacobs, W. Kockelmann,„The manganese nitrides η-Mn3N2 and θ-Mn6N5+x: Nuclear and magnetic structures”, J. Mater. Chem. 10 (2000) 2827.

27.  J. Klatyk, R. Niewa, R. Kniep,„Ca{Li2[MnIN]2}: Kristallchemischer Brückenschlag zwischen Lithium-Nitrido-Verbindungen und Borid-Carbiden des Typs M[B2C2]”, Z. Naturforsch. 55b (2000) 988.

28.  M. Ludwig, J. Jäger, R. Niewa, R. Kniep,„Crystal Structures of two Polymorphs of Ca3[Al2N4]”, Inorg. Chem. 39 (2000) 5909.

29.  R. Niewa, W. Schnelle, F. R. Wagner,„Synthesis, Crystal Structure and Physical Properties of (Ca3N)Tl”, Z. Anorg. Allg. Chem. 627 (2001) 365.

30.  F. Tessier, M. R. Ranade, A. Navrotsky, R. Niewa, F. J. DiSalvo, A. Leineweber, H. Jacobs,„Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce–Mn–N”, Z. Anorg. Allg. Chem. 627 (2001) 194.

31.  R. Niewa, R. Kniep,„Redetermination of the crystal structure of heptalithium tetranitridovanadate(V), Li7[VN4]”, Z. Kristallogr. NCS 216 (2001) 5.

32.    Yu. M. Prots‘, R. Niewa, W. Schnelle,„Neue ternäre Erdalkali-Cer(IV)-nitride: CaCeN2 und SrCeN2”, Z. Kristallogr. Suppl. 18 (2001) 138.

33.    L. Vasylechko, R. Niewa, H. Borrmann, M. Knapp, D. Savytskii, A. Matkovski, U. Bismayer, M. Berkowski,„R-3c - Pbnm phase transition of La1–xSmxGaO3 (0 < x < 0.3) perovskites and crystal structures of the orthorhombic and trigonal phases”, Solid State Ionics 143 (2001) 219.

34.    U. Heckers, R. Niewa, H. Jacobs,„Abstandsvergleich M–H/M–D aus Röntgen- und Neutronenbeugungsdaten am Beispiel von Na3Rh(H/D)6”, Z. Anorg. Allg. Chem. 627 (2001) 1401.   

35.  R. Niewa, F. R. Wagner, W. Schnelle, O. Hochrein, R. Kniep,„Li24[MnN3]3N2 and Li5[(Li1–xMnx)N]3, Two Intermediates in the Decomposition Path of Li7[MnN4] to Li2[(Li1–xMnx)N]: An Experimental and Theoretical Study”, Inorg. Chem. 40 (2001) 5215.

36.    R. Niewa, P. Höhn, R. Kniep, A. Weiske, H. Jacobs,„Crystal structure of pentapotassium dicarbodiimide monohydride, K5[CN2]2H”, Z. Kristallogr. NCS 216 (2001) 335.

37.    U. Schwarz, R. Giedigkeit, R. Niewa, M. Schmidt, W. Schnelle, R. Cardoso, M. Hanfland, Z. Hu, K. Klementiev, Yu. Grin,„Pressure-induced Oxidation State Change of Ytterbium in YbGa2”, Z. Anorg. Allg. Chem. 627 (2001) 2249.

38.  R. Niewa,„Nitridocompounds of manganese: manganese nitrides and nitridomanganates”, Z. Kristallogr. 217 (2002) 8.

39.  J. Klatyk, W. Schnelle, F. R. Wagner, R. Niewa, P. Nowak, R. Kniep, M. Waldeck, V. Ksenofontov, P. Gütlich,„Large Orbital Moments and Internal Magnetic Fields in Lithium-Nitridoferrate(I)”, Phys. Rev. Lett. 88 (2002) 207202.

40.  R. Niewa,„Na3N – ein origineller Syntheseweg für ein lange gesuchtes binäres Nitrid”, Angew. Chem. 114 (2002) 1777,„Na3N – An Original Synthetic Route for a Binary Nitride long Sought After”, Angew. Chem. Int. Ed. 41 (2002) 1701.

41.  R. Niewa, W. Schnelle, F. R. Wagner, Z.-L. Huang, J. Klatyk, M. Kirchner, G. Auffermann, Yu. Prots‘, M. Kohout, U. Schmidt, M. Baenitz, S. Bühler-Paschen, A. Bentien, R. Kniep, P. Novák, P. Gütlich, R. Schlögel, S. F. Parker,„Metallreiche Stickstoffverbindungen: Zwischen Valenzverbindungen und metallischen Systemen”, Jahrbuch der Max-Planck-Gesellschaft (2002) 601.

42   R. Giedigkeit, R. Niewa, W. Schnelle, Y. Grin, R. Kniep,„On the binary compound YbGa5”, Z. Anorg. Allg. Chem. 628 (2002) 1692.

43.  Y. Prots‘, R. Niewa, W. Schnelle, R. Kniep,„New Ternary Alkaline Earth Cerium(IV) Nitrides: CaCeN2 and SrCeN2”, Z. Anorg. Allg. Chem. 628 (2002) 1590.

44.  R. Niewa, D. A. Zherebtsov, R. Kniep,„Zur Polymorphie von Li7[VN4]”, Z. Anorg. Allg. Chem. 628 (2002) 2202.

45.  M. Kirchner, R. Niewa, W. Schnelle, F. R. Wagner, D. Walther, R. Kniep,„Seltenerdnitride des Indiums (R3N)In”, Z. Anorg. Allg. Chem. 628 (2002) 2202.

46.  R. Niewa, D. A. Zherebtsov, H. Borrmann, R. Kniep,„Preparation and Crystal Structure of Li4[TaN3]”, Z. Anorg. Allg. Chem. 628 (2002) 2505.

47.  R. Niewa, D. A. Zherebtsov,„Redetermination of the crystal structure of tetralithium nitride hydride, Li4NH”, Z. Kristallogr. NCS 217 (2002) 317.

48.  R. Niewa, Z. Hu, C. Grazioli, U. Rößler, M. S. Golden, M. Knupfer, J. Fink, H. Giefers, G. Wortmann, F. M. F. de Groot, F. J. DiSalvo,„XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, Mn-L2,3 and N-K thresholds”, J. Alloys Compd. 346 (2002) 129.

49.  D. A. Zherebtsov, L. G. Akselrud, R. Niewa,„Crystal structure of dicalcium trinitridomonovanadate(V), Ca2[VN3]”, Z. Kristallogr. NCS 217 (2002) 469.

50.  L. Vasylechko, W. Schnelle, U. Burkhardt, R. Ramlau, R. Niewa, H. Borrmann, K. Hiebl, Z. Hu, Yu. Grin,„Crystal structure, magnetic behaviour and valence state of ytterbium in the Yb4Ni10+xGa21–x phase”, J. Alloys Compd. 350 (2003) 9.

51.  R. Niewa, Z.-L. Huang, W. Schnelle, Z. Hu, R. Kniep,„Preparation, Crystallographic, Spectroscopic and Magnetic Characterization of Low-valency Nitridometalate Phases Li2[(Li1–xMx)N] with M = Cu, Ni”, Z. Anorg. Allg. Chem. 629 (2003) 1778.

52.  L. Vasylechko, V. Vashook, D. Savytskii, A. Senyshyn, R. Niewa, M. Knapp,H. Ullmann, M. Berkowski, A. Matkovskii, U. Bismayer,„Crystal structure, thermal expansion and conductivity of anisotropic La1–xSrxGa1–2xMg2xO3–y (x = 0.05, 0.1) single crystals”, J. Solid State Chem. 172 (2003) 396.

53.  R. Cardoso, R. Niewa, M. Schmidt, M. Armbrüster, M. Hanfland, K. Klementiev, U. Schwarz,„Pressure-induced Changes of the Crystal Structure of Eu4P3”,  Z. Anorg. Allg. Chem. 629 (2003) 454.

54.  R. Niewa, Z. Hu, R. Kniep,„Mn and Fe K-edge XAS Spectra of Manganese and Iron Nitrido Compounds”, Eur. J. Inorg. Chem. (2003) 1632.         

55.  R. Niewa, D. A. Zherebtsov, Z. Hu,„Polymorphism of Heptalithium Nitridovanadate(V) Li7[VN4]”, Inorg. Chem. 42 (2003) 2538.

56.  R. Niewa, D. A. Zherebtsov, S. Leoni,„Li3[ScN2]: The First Nitridoscandate(III) – Tetrahedral Coordination and Unusual MX2-Framework”, Chem. Eur. J. 9 (2003) 4255.

57.  M. Kirchner, W. Schnelle, F. R. Wagner, R. Niewa,„Preparation, Crystal Structure and Physical Properties of Ternary Compounds (R3N)In, R = Rare-Earth Metal”, Solid State Sci. 5 (2003) 1247.

58.  R. Niewa, D. A. Zherebtsov, P. Höhn,„Crystal structure of tristrontium tetranitridomonochromate(VI), Sr3[CrN4]”, Z. Kristallogr. NCS 218 (2003) 163.

59.  V. Ksenofontov, S. Reiman, M. Waldeck, R. Niewa, R. Kniep, P. Gütlich,„In situ-High Temperature Mössbauer Spectroscopy of Iron Nitrides and Nitridoferrates”, Z. Anorg. Allg. Chem. 629 (2003) 1787.

60.  R. Niewa, D. A. Zherebtsov,„New Phases in the Lithiumnitridovanadate System – The Solid Solution Li7–2xMgx[VN4] (0 ≤ x ≤ 1)”, Z. Anorg. Allg. Chem. 630 (2004) 229.

61.  M. Kirchner, H. Zhang, R. Niewa,„Die Kristallstruktur von La16Al13”, Z. Kristallogr. Suppl. 21 (2004) 167.

62.  W. Schnelle, R. Niewa, F. R. Wagner,„Magnetic and electronic properties of lithium nitridometalates Li2[(Li1-xTx)N] (T = Co, Ni, Cu)”, J. Magn. Magn. Mater. 272–276 (2004) 828.

63.  F. Gäbler, M. Kirchner, W. Schnelle, H. Rosner, R. Niewa,„Perowskit-Nitride (A3Nx)E mit A = Sr, Ba und E = Sb, Bi (x = 1), E = Sn, Pb (x < 1) ”, Z. Anorg. Allg. Chem. 630 (2004) 1723.

64.  M. Kirchner, F. R. Wagner, W. Schnelle, R. Niewa,„Beiträge zur Verbindungsbildung im System Ca–In–N”, Z. Anorg. Allg. Chem. 630 (2004) 1735.

65.  R. Niewa, D. A. Zherebtsov, W. Schnelle, F. R. Wagner,„Metal–Metal Bonding in ScTaN2. A New Compound in the System ScN–TaN”, Inorg. Chem. 43 (2004) 6188.

66.  F. Gäbler, M. Kirchner, W. Schnelle, U. Schwarz, M. Schmitt, H. Rosner, R. Niewa,„(Sr3N)E and (Ba3N)E (E = Sb, Bi): Synthesis, Crystal Structure, and Physical Properties”, Z. Anorg. Allg. Chem. 630 (2004) 2292.

67.  R. Niewa, D. A. Zherebtsov, M. Kirchner, M. Schmidt, W. Schnelle,„New Ways to High-Quality Bulk Scandium Nitride” Chem. Mater. 16 (2004) 5445.

68.  A. Schlechte, Yu. Prots, R. Niewa,„Crystal Structure of hexabarium mononitride pentaindide, (Ba6N)[In5]”, Z. Kristallogr. NCS 219 (2004) 349.

69.  J. Schmidt, R. Niewa, M. Schmidt, Yu. Grin,„Spark Plasma Sintering Effect on the Decomposition of MgH2”, J. Am. Ceram. Soc. 88 (2005) 1870.

70.  R. Niewa, M. Schmidt, T. Cichorek, G. Auffermann, R. Ramlau, Yu. Prots, U. Schmidt, A. Völzke, K. Schulze, U. Burckhardt, H. Borrmann, R. Cardoso, W. Schnelle, A. Schlechte, F. Steglich, R. Kniep,„ZrAs1,4Se0,5 – Ein neues nicht-magnetisches Kondo-System mit den Eigenschaften eines einfachen Metalls”, Jahrbuch der Max-Planck-Gesellschaft (2005) 535.

71.  M. Boström, R. Niewa, Yu. Prots, Yu. Grin,„Synthesis, phase relationship and crystal structure of the new binary compound Ir13Al45”, J. Solid State Chem. 178 (2005) 339.

 72.  A. Lieb, M. T. Weller, P. F. Henry, R. Niewa, R. Pöttgen, R.-D. Hoffmann, H. E. Höfer, W. Schnick „Oxonitridosilicate-chlorides – Synthesis, Single-Crystal X-ray and Neutron Powder Diffraction, Chemical Analysis and Properties of Ln4[Si4O3+xN7–x]Cl1–xOx with Ln = Ce, Pr, Nd and x ≈ 0.2”, J. Solid State Chem. 178 (2005) 976.

73.  F. Gäbler, M. Kirchner, W. Schnelle, M. Schmitt, H. Rosner, R. Niewa,„(Sr3Nx)E and (Ba3Nx)E (E = Sn, Pb): Preparation, Crystal Structures, Physical Properties and Electronic Structures”, Z. Anorg. Allg. Chem. 631 (2005) 397.

74.  R. Niewa, M. Kirchner, H. Zhang, W. Schnelle, Yu. Grin,„Metallic barrelane: crystal structure, physical properties and bonding analysis of La16Al13”, Z. Kristallogr. 220 (2005) 115.

75.  J. P. A. Makongo, Yu. Prots, U. Burkhardt, R. Niewa, G. Kreiner,„Disorder and homogeneity range in the structure of the complex alloy phase Mg6Pd”, Z. Kristallogr. Suppl. 22 (2005) 71.

76.  M. Kirchner, W. Schnelle, F. R. Wagner, R. Kniep, R. Niewa,„(A19N7)[In4]2 (A = Ca, Sr) and (Ca4N)[In2]: Synthesis, Crystal Structures, Physical Properties, and Chemical Bonding”, Z. Anorg. Allg. Chem. 631 (2005) 1477.

77.  J. P. A. Makongo, C. Kudla, Yu. Prots, R. Niewa, U. Burkhardt, G. Kreiner,„Redetermination of the crystal structure of trimagnesium palladium, Mg3Pd”, Z. Kristallogr. NCS 220 (2005) 289S.

78.  A. Schlechte, M. Schmidt, T. Cichorek, P. Simon, Yu. Prots, Th. Doert, R. Niewa,F. Steglich, R. Kniep,„Ordnung und Unordnung in Phasen vom PbFCl-Typ im System Zr–As–Se”, Z. Kristallogr. Suppl. 22 (2005) 115.

79.  R. Niewa, D. Wilmer,„Festkörperchemie 2004”, Nachrichten aus der Chemie 53 (2005) 244.

80.  J. P. A. Makongo, Yu. Prots, R. Niewa, U. Burkhardt, G. Kreiner,„Crystal structure of dimagnesium monopalladium, Mg2Pd”, Z. Kristallogr. NCS 220 (2005) 291.

81.  M. Schmidt, T. Cichorek, R. Niewa, A. Schlechte, Yu. Prots, F. Steglich, R. Kniep,„Crystallographic disorder and electron scattering on structural two-level systems in ZrAs1.4Se0.5”, J. Phys.: Condens. Matter 17 (2005) 5481.

82.  Leoni, R. Niewa, L. Akselrud, Yu. Prots, W. Schnelle, T. Göksu, M. Cetinkol, M. Somer, R. Kniep,„Novel Barium Beryllates Ba[Be2N2] and Ba3[Be5O8]: Syntheses, Crystal Structures and Bonding Properties”, Z. Anorg. Allg. Chem. 631 (2005) 1818.

83.  A. Houben, P. Müller, J. von Appen, H. Lueken, R. Niewa, R. Dronskowski,„Synthesis, Crystal Structure and Magnetic Properties of the Semihard Itinerant Ferromagnet RhFe3N”, Angew. Chem. Int. Ed. 44 (2005) 7212. „Synthese, Kristallstruktur und magnetische Eigenschaften des halbharten iteneranten Ferromagneten RhFe3N”,  Angew. Chem. 117 (2005) 7379.

84.  S. Natarajan, Yu. Prots, R. Niewa, R. Kniep,„Crystal structure of 1,2-ethylenediamine-dizinc diphosphate(III), Zn2(C2H8N2)(HPO3)2”, Z. Kristallogr. NCS 220 (2005) 455.

85.  J. P. A. Makongo, Yu. Prots, U. Burkhardt, R. Niewa, C. Kudla, G. Kreiner,„A case study of complex metallic alloy phases: Structure and disorder phenomena of Mg–Pd compounds”, Phil. Mag. 86 (2006) 427.

86.  M. Kirchner, F. Gäbler, W. Schnelle, F. R. Wagner, R. Niewa,„(La3Zx)Al and (Ce3Zx)Al with Z = C, N, O: Preparation, Physical Properties and Chemical Bonding of Metal-rich Perovskites”, Z. Kristallogr. 221 (2006) 543.

87.  S. Natarajan, Yu. Prots, B. Ewald, R. Niewa, R. Kniep,„Polymorphism of [Zn(2,2’-bipy)(H2PO4)2]2”, Z. Anorg. Allg. Chem. 632 (2006) 37.

88.  R. Niewa, D. A. Zherebtsov, Comment on the Paper: „Synthesis and Electrochemical Study of Antifluorite-
type Phases in the Li–M–N–O (M = Ti, V) Systems”, Z. Anorg. Allg. Chem. 632 (2006) 387.

89.  F. Gäbler, R. Niewa,„Strukturvielfalt inverser Perowskite”, Z. Anorg. Allg. Chem. 632 (2006) 2103.

90.  B. Schüpp-Niewa, L. Shlyk, Yu. Prots, R. Niewa, G. Krabbes,„Crystal structure of Ba3ZrRu2O9 – a new 6H-(cch)2 perovskite”, Z. Anorg. Allg. Chem. 632 (2006) 572.

91.  M. Kirchner, W. Schnelle, R. Niewa,„Inverse Perovskites (RE3N)Sn with RE = La, Ce, Pr, Nd, Sm: Preparation, Crystal Structure and Physical Properties”, Z. Naturforsch. 61b (2006) 813.

92.  K. Söderberg, M. Boström, Y. Kubota, T. Nishimatsu, R. Niewa, U. Häussermann, Y. Grin, O. Terasaki,„Crystal structures and phase stability in pseudobinary CaAl2–xZnx”, J. Solid State Chem. 179 (2006) 2690.

93.  M. Boström, H. Lind, S. Lidin, R. Niewa, Y. Grin,„Synthesis, crystal structure, phase relations and chemical bonding analysis of the new Nowotny chimney-ladder compound ZrBi1.62” Solid State Sci. 8 (2006) 1173.

94.  M. Kirchner, W. Schnelle, R. Niewa,„Inverse Perovskites (Eu3O)E with E = Sn, In: Preparation, Crystal Structures and Physical Properties”, Z. Anorg. Allg. Chem. 632 (2006) 559.

95.  A. Schlechte, R. Niewa, T. Cichorek, Yu. Prots, M. Schmidt, R. Ramlau, R. Kniep,„Beiträge zu ternären metallischen Zr Pniktidchalkogeniden”, Z. Anorg. Allg. Chem. 632 (2006) 2107.

96.  F. Gäbler, Yu. Prots, R. Niewa,„First Observation of an Inverse Ruddlesden-Popper Series: (A3n+1ONn–1)Bin+1 with A = Sr, Ba and n = 1, 3”, Z. Anorg. Allg. Chem. 633 (2007) 93.

97.  F. Gäbler, R. Niewa,„Stacking Design of Inverse Perovskites: The Systems (Sr3–xBaxN)E, E = Bi, Sb”, Inorg. Chem. 46 (2007) 859.   

98.  T. Cichorek, D. Gnieda, R. Niewa, A. Schlechte, M. Schmidt, Yu. Prots, R. Ramlau, Z. Henkie, R. Kniep, F. Steglich,„Resistivity Anomaly in Structurally Disordered PbFCl-type Arsenide Selenides”, J. Low Temp. Phys. 147 (2007) 309.

99.  L. Vasylechko, A. Senyshyn, D. Trots, R. Niewa, W. Schnelle, M. Knapp,„CeAlO3 and Ce1–xRxAlO3 (R = La, Nd) solid solutions: Crystal structure, thermal expansion and phase transitions”, J. Solid State Chem. 180 (2007) 1277.

100.   J. P. A. Makongo, U. Burkhardt, Y. Prots, R. Niewa, G. Kreiner,„Komplexität in der Welt intermetallischer Phasen”, Jahrbuch der Max-Planck-Gesellschaft (2007) 503.
 
101.   F. Karau, O. Oeckler, R. Niewa, F. Schäfers, W. Schnick,„[Zn8P12N24]O2 ein Nitridophosphat-oxid mit Sodalith-Struktur”, Z. Anorg. Allg. Chem. 633 (2007) 1333.

102.   A. Schlechte, R. Niewa, M. Schmidt, G. Auffermann, Yu. Prots, W. Schnelle, D. Gnida, T. Cichorek, F. Steglich, R. Kniep,„Thermo-chemical properties and electrical resistivity of Zr-based arsenide chalcogenides”, Sci. Technol. Adv. Mater. 8 (2007) 341.

103.   A. Schlechte, Yu. Prots, R. Niewa, Th. Doert, M. Schmidt, R. Kniep,„CeAsSe – Ein neues ternäres Seltenerd-Pniktidchalkogenid”, Z. Kristallogr. Suppl. 26 (2007) 079-62-id54.

104.   B. Schüpp-Niewa, L. Shlyk, S. Kryukov, L. E. De Long, R. Niewa, „BaFe3.39(5)Ru2.61(5)O11 and BaCo1.85(6)Ru4.15(6)O11: Preparation, Crystal Structures, and Magnetic and Transport Properties of Quaternary Transition Metal Oxoruthenates”, Z. Naturforsch. 62b (2007) 753.

105.   R. Ranjan, A. Senyshyn, V. Vashook, R. Niewa, H. Boysen, F. Frey,„Structural stability of conducting oxide CaRuO3 at high temperatures”, Appl. Phys. Lett. 90 (2007) 251913.

106.   B. Schüpp-Niewa, L. Shlyk, Yu. Prots, G. Krabbes, R. Niewa,„Ba3YRu0.73(2)Al1.27(2)O8 and Ba5Y2Ru1.52(2)Al1.47(2)O13.5: New Perovskite Ruthenates with Partial Octahedra Replacement”, Z. Naturforsch. 62b (2007) 1383.

107.   A. Schlechte, R. Niewa, M. Schmidt, H. Borrmann, G. Auffermann, R. Kniep,„Crystal structure of hafnium arsenide selenide, HfAs1.69Se0.21”, Z. Kristallogr. NCS 222 (2007) 369.

108.   L. Shlyk, L. E. De Long, S. Kryukov, B. Schüpp-Niewa, R. Niewa,„Structural, magnetic and transport properties of a novel class of ferromagnetic semiconductors: SrMxRuxO11 (M = Fe, Co)”, J. Appl. Phys. 103 (2008) 07D112.

109.   T. V. Basyuk, T. Tataryn, L. O. Vasylechko, S. Fadyeev, I. I. Syvorotka, D. Trots, R. Niewa,„Phase and Structural Behaviour of the PrAlO3–LaAlO3 Pseudo-Binary System”, Synch. Rad. Natur. Sci. 7 (2008) 117.

110.   L. Shlyk, S. Kryukov, B. Schüpp-Niewa, R. Niewa, L. E. De Long,„High Temperature Ferromagnetism and Tunable Semiconductivity of (Ba,Sr)MxRuxO11 (M = Fe, Co): A New Paradigm for Spintronics”, Adv. Mater. 20 (2008) 1315.

111.   L. V. Shlyk, S. A. Kryukov, L. E. De Long, B. Schüpp-Niewa, R. Niewa, J. W. Lynn, Qing Huang, E. Arenholz, C. Piamonteze,„A Novel Class of High-TC Ferromagnetic Semiconductors”, Proceedings of the IEEE, 17th Biennial University/Government/Industry Micro/ Nano Symposium UGIM 2008 University of Louisville, Kentucky, USA, 142.

112.   F. Gäbler, W. Schnelle, A. Senyshyn, R. Niewa,„Magnetic Structure of the Inverse Perovskite (Ce3N)In”, Solid State Sci. 10 (2008) 1910.

113.   A. Schlechte, R. Niewa, B. Pedersen, M. Schmidt, H. Borrmann, R. Kniep,„As–Se-Ordnung in ZrAs1,6−δSe0,4 aus Neutronen- und Röntgenbeugung am Einkristall”, Z. Kristallogr. Suppl. 28 (2008) 1B-21.

114.   R. Niewa, D. Rau, A. Wosylus, K. Meier, M. Wessel, R. Dronskowski, U. Schwarz,„High Pressure–High Temperature Phase Transition of γ’-Fe4N”, J. Alloys Compd. 480 (2009) 76.

115.   T. V. Basyuk, L. O. Vasylechko, S. Fadyeev, I. I. Syvorotka, D. Trots, R. Niewa,„Phase and structural behaviour of the PrAlO3–LaAlO3 pseudo-binary system”, Rad. Phys. Chem. 78 (2009) S97.

116.   R. Niewa, D. Rau, A. Wosylus, K. Meier, M. Hanfland, M. Wessel, R. Dronskowski, D. Dzivenko, R. Riedel, U. Schwarz,„High pressure–high temperature single crystal growth, ab initio electronic structure calculations and equation of state of ε-Fe3N1+x”, Chem. Mater. 21 (2009) 392.

117.   T. Basyuk, L. Vasylechko, I. Syvorotka, U. Schmidt, D. Trots, R. Niewa,„Crystal structures, thermal expansion and phase transitions of mixed Pr1–xLaxAlO3 perovskites”, Physica status solidi (c) 6 (2009) 1008.

118.   A. Schlechte, R. Niewa, Yu. Prots, W. Schnelle, M. Schmidt, R. Kniep,„CeAsSe – synthesis, crystal structure, and physical properties”, Inorg. Chem. 48 (2009) 2277.

119.   U. Schwarz, A. Wosylus, M. Wessel, R. Dronskowski, M. Hanfland, D. Rau, R. Niewa,„High Pressure–High Temperature Behavior of z-Fe2N and Phase Transition to ε-Fe3N1.5”, Eur. J. Inorg. Chem. (2009) 1634.

120.   A. Schlechte, K. Meier, M. Schmidt, Yu. Prots, R. Niewa, and R. Kniep,„Crystal structure of zirconium phosphide sulphide, ZrP1.4S0.6”, Z. Kristallogr. NCS 224 (2009) 375.

121.   D. M. Trots, A. Senyshyn, L. Vasylechko, R. Niewa, T. Vad, V. B. Mikhailik, H. Kraus,„Crystal structure of ZnWO4 scintillator material in the range of 3 – 1423 K”, J. Phys.: Condens. Matter 21 (2009) 325402.

122.   A. Wosylus, U. Schwarz, L. Akselrud, M. G. Tucker, M. Hanfland, K. Rabia, C. Kuntscher, J. von Appen, R. Dronskowski, D. Rau, R. Niewa,„High-pressure Phase Transition and Properties of Cu3N: An Experimental and Theoretical Study”, Z. Anorg. Allg. Chem. 635 (2009) 1959.

123.   D. Bräunling, A. Senyshyn, R. Niewa,„Kristallstruktur der Li-reichen Nitrid-Chalkogenide Li8EN2 (E = Se, Te)”, Z. Kristallogr. Suppl. 29 (2009) 15.

124.   D. Rau, U. Schwarz, A. Wosylus, M. Wessel, R. Dronskowski, M. Hanfland, R. Niewa,„ζ-Fe2N: Hochdruck-Hochtemperatur-Verhalten und Phasenumwandlung zu ε-Fe3N1.5”, Z. Kristallogr. Suppl. 29 (2009) 82.

125.   G. V. Vajenine, C. Hoch, R. E. Dinnebier, A. Senyshyn, R. Niewa,„A temperature-dependent structural study of anti-ReO3-type Na3N: to distort or not to distort?”, Z. Anorg. Allg. Chem. 636 (2010) 94.

126.   R. Niewa, L. Shlyk, B. Schüpp-Niewa, L. E. De Long,„Crystal Structures of Ternary Ruthenium Ferrites SrM2±xRuxO11 with M = Fe, Co and Magnetic and Transport Properties of Al-doped Single Crystals”, Z. Anorg. Allg. Chem. 636 (2010) 331.

127.   T. Cichorek, Ł. Bochenek, R. Niewa, M. Schmidt, A. Schlechte, R. Kniep, F. Steglich,„Electron scattering off structural two-level systems in ZrAs1.595(3)Se0.393(1)”, J. Phys.: Conf. Ser. 200 (2010) 012021.

128.   T. Basyuk, L. Vasylechko, S. Fadeev, V. Berezovets, D. Trots, R. Niewa,„Phase and structural behaviour of the PrAlO3–SmAlO3 system”, Acta Physica Polonica A 117 (2010) 98.

129.   D. Bräunling, O. Pecher, D. M. Trots, A. Senyshyn, D. A. Zherebtsov, F. Haarmann, R. Niewa,„Synthesis, Crystal Structure and Li-Motion of Li8SeN2 and Li8TeN2”, Z. Anorg. Allg. Chem. 636 (2010) 936.

130.   F. Gäbler, R. Niewa,„Polymorphism of Eu8In3 and the Solid Solution (CaxEu1–x)8In3”, Z. Anorg. Allg. Chem. 636 (2010) 1803.

131.   A. Schlechte, G. Auffermann, M. Bednarski, Ł. Bochenek, M. Böhme, T. Cichorek, R. Niewa, N. Oeschler, M. Schmidt, F. Steglich, R. Kniep,„Crystal Chemistry and Physical Properties of the Non-Magnetic Kondo-Compound HfAs1.7Se0.2”, ChemPhysChem 11 (2010) 2639.

132.   F. Gäbler, D. Bräunling, A. Senyshyn, W. Schnelle, R. Niewa,„Nitrides with Inverse K2[NiF4] Structure: (R1–xCa3+xN1–x/3)Bi2 with R = Rare-Earth Metal”, Z. Anorg. Allg. Chem. 636 (2010) 1222.

133.   B. Schüpp-Niewa, L. Shlyk, L. Akselrud, Yu. Prots, R. Niewa,„Crystal structure of the incommensurate composite ruthenate [Ba]1.30[(Ru,Cu)O3]”, Z. Kristallogr. 225 (2010) 274.

134.   R. Niewa, A. Czulucki, M. Schmidt, G. Auffermann, T. Cichorek, M. Meven, B. Pedersen, F. Steglich, R. Kniep,„Crystal Structure Investigations of ZrAsxSey (x > y, x + y ≤ 2) by Single Crystal Neutron Diffraction at 300 K, 25 K and 2.3 K”, J. Solid State Chem. 183 (2010) 1309.

135.   R. F. Zhang, D. Legut, R. Niewa, A. S. Argon, S. Veprek,„Shear-induced structural transformation and plasticity in ultra-incompressible ReB2 limit its hardness”, Phys. Rev. B 82 (2010) 104104.    

136.   L. Shlyk, R. Niewa, L. E. De Long,„Anomalous Hall Effect in High Temperature Ferrimagnetic Semiconductors BaFexRuxO11”, Phys. Rev. B 82 (2010) 134432.

137.   L. E. De Long, L. Shlyk, G. Cao, R. Niewa,„The Promise of Strong Spin-Orbit Coupling: Novel Materials with Novel Properties for Novel Devices”, Proceedings of the IEEE, International Conference on Electromagnetics in Advanced Applications ICEAA'10, Sydney, Australien, 591.

Publikationen 2011 - 2019

138.   T. Basyuk, V. Berezovets, D. Trots, S. Hoffmann, R. Niewa, L. Vasylechko,„Phase diagram of the PrAlO3-GdAlO3 system”, Z. Kristallogr. Proc. 1 (2011) 319.

139.   R. Niewa, L. Shlyk, B. Blaschkowski,„Rare-Earth Metal Transition Metal Borocarbide and Nitridoborate Superconductors”, Z. Kristallogr. 226 (2011) 352.

140.   Ch. M. Schurz, L. Shlyk, Th. Schleid, R. Niewa,„Superconducting Nitride Halides MNX (M = Ti, Zr, Hf; X = Cl, Br, I)”, Z. Kristallogr. 226 (2011) 395.

141.   F. Gäbler, D. Bräunling, W. Schnelle, I. Schellenberg, R. Pöttgen, R. Niewa,„The Inverse Perovskite (Ca2EuNx)Sn: A Rare Example for a Homogeneously Mixed-Valent Compound?”, Z. Anorg. Allg. Chem. 637 (2011) 977.

142.   M. Bischoff, D. Gudat, R. Niewa,„Synthesis and Crystal Structure of Ba2In – How Binary are Binary Phase Diagrams?”, Z. Kristallogr. 226 (2011) 585.

143.   D. Bräunling, R. Niewa,„Ce2[CrN3]: Single Phase Synthesis and Characterization of a Nitridochromate(I)”, Z. Anorg. Allg. Chem. 637 (2011) 1853.

144.   L. Shlyk, R. Niewa,„BaSn6Co6O19 – A Novel Frustrated Antiferromagnet with the Magnetoplumbite Type Structure”, J. Solid State Chem. 184 (2011) 3158.

145.   L. Shlyk, R. Niewa,„Crystal Structure and Magnetic Properties of the Novel Hollandite Ba1.3Co1.3Ti6.7O16”, Z. Naturforsch. 66b (2011) 1097.

146.   A. Senyshyn, H. Boysen, R. Niewa, Y. Burak, V. Adamiv, I. Chumak, H. Fuess,„Crystal structure of Li2B4O7”,Z. Kristallogr. Suppl. 31 (2011) 19.

147.   M. Bischoff, R. Niewa,„Crystal Structure and Thermochemical Classification of Ba2In”, Z. Kristallogr. Suppl. 31 (2011) 88.

148.   L. Shlyk, S. Strobel, E. Rose, R. Niewa,„BaZnRu5O11: Novel Compound with Frustrated Magnetic Lattice Based on Distorted Kagome Networks”, Solid State Sci. 14 (2012) 281.

149.   A. Senyshyn, H. Boysen, R. Niewa, J. Banys, M. Kinka, Ya. Burak, V. Adamiv, F. Izumi, I. Chumak, H. Fuess, „High-temperature properties of lithium tetraborate Li2B4O7”, J. Phys. D: Appl. Phys. 45 (2012) 175305.

150.   A. Leineweber, S. L. Shang, Z. K. Liu, M. Widenmeyer, R. Niewa,„Crystal structure determination of χ-Fe5C2 by first-principles calculations and Rietveld refinement“, Z. Kristallogr. 227 (2012) 207.

151.   L. Shlyk, S. Strobel, Th. Schleid, R. Niewa,„Ruthenate-ferrites AMRu5O11 (A = Sr, Ba; M = Ni, Zn): Distortion of kagome nets via metal–metal bonding”, Z. Kristallogr. 227 (2012) 545.

152.   S. Zhang, D. A. Zherebtsov, F. J. DiSalvo, R. Niewa,„Na5[CN2]2[CN], (Li,Na)5[CN2]2[CN], and K2[CN2]: Carbodiimides from High-Pressure Synthesis”, Z. Anorg. Allg. Chem. 638 (2012) 2111.

153.   C. Lipp, S. Strobel, F. Lissner, R. Niewa,„Garnet-type Mn3Cr2[GeO4]3”, Acta Crystallogr. E 68 (2012) i35.

154.   D. A. Vinnik, D. A. Zherebtsov, S. A. Archugov, M. Bischoff, R. Niewa,„Crystal Growth and Characterization of Alexandrite” Cryst. Growth & Design 12 (2012) 3954.

155.   M. Widenmeyer, R. Niewa,„In situ neutron diffraction in the system Fe–N”, Z. Anorg. Allg. Chem. 638 (2012) 1628.

156.   M. Widenmeyer, R. Niewa,„In situ neutron diffraction in the system V–N”, Z. Anorg. Allg. Chem. 638 (2012) 1629.

157.   M. Bischoff, L. Shlyk, E. Rose, S. Zapf, M. Dressel, R. Niewa,„Sb doped LiFeAs Single Crystals: Crystal Structure and Physical Properties”, Z. Anorg. Allg. Chem. 638 (2012) 1628.

158.   L. Shlyk, M. Bischoff, E. Rose, R. Niewa,„Flux Pinning and Magnetic Relaxation in Ga-doped LiFeAs Single Crystals”, J. Appl. Phys. 112 (2012) 053914.

159.   L. Shlyk, M. Bischoff, R. Niewa,„Influence of Si on superconducting properties of LiFeAs single crystals”,          Supercond. Sci. Technol. 25 (2012) 125006.

160.   K. Guo, D. Rau, L. Toffoletti, C. Müller, U. Burkhardt, W. Schnelle, R. Niewa, U. Schwarz,„The ternary metastable nitrides Fe2TMN (TM = Co, Ni): high-pressure high-temperature synthesis, crystal structure, thermal stability and magnetic properties”, Chem. Mater. 24 (2012) 4600.

161.   S. Zhang, R. Niewa,„Novel Amides and Amines of Gallium: A Brief Discussion on Synthesis and Their Crystal Structures”, Z. Kristallogr. Suppl. 32 (2012) 103.

162.   L. Shlyk, M. Bischoff, E. Rose, R. Niewa,„Evolution of Superconducting Properties of LiFeAs Single Crystals Doped with Magnetic or Nonmagnetic Impurities”, J. Supercond. Novel Magn. 26 (2013) 1189.

163.   M. Widenmeyer, R. Niewa, T. C. Hansen, H. Kohlmann,„In situ neutron diffraction as a probe on formation and decomposition of nitrides and hydrides: A case study”, Z. Anorg. Allg. Chem. 639 (2013) 285.

164.   L. Shlyk, R. Niewa,„Synthesis, Crystal Growth and Structure, Magnetic and Electrical Properties of Ba4Ru2FeO10 and Ba4Ru2CoO10”, Solid State Sci. 19 (2013) 58.

165.   K. Guo, D. Rau, J. von Appen, Y. Prots, W. Schnelle, R. Dronskowski, R. Niewa, U. Schwarz,„High-Pressure High-Temperature Behavior and magnetic Properties of Fe4N:Experiment and Theory”, High Pres. Res. 33 (2013) 684.           

166.   R. Niewa, S. Zhang, T. Richter,„Chemistry of Ammonothermal Nitride Growth” Z. Kristallogr. Suppl. 33 (2013) 26.

167.   M. Bischoff, L. Shlyk, R. Niewa,„Zr2Fe12As7: A New Iron Arsenide with Structural Relations to LiFeAs”, Z. Kristallogr. Suppl. 33 (2013) 72.

168.   T. Richter, S. Zhang, R. Niewa,„Ammonothermal Synthesis of a New Modification of K2[Zn(NH2)4]”, Z. Kristallogr. Suppl. 33 (2013) 82.

169.   R. Niewa, S. Zhang,„Intermediates during Ammono-basic Crystal Growth of GaN”, Z. Kristallogr. Suppl. 33 (2013) 127.

170.   R. Niewa,„Alkaline-earth Metal Nitrides of the Main-Group Elements: Crystal Structures and Properties of Inverse Perovskites” Z. Anorg. Allg. Chem. 639 (2013) 1699.       

171.   M. Bischoff, L. Shlyk, R. Niewa,„Zr2Fe12As7 and Hf2+xFe12–yAs7 with Zr2Fe12P7 type structure: Iron Arsenides with Layered Sections from LiFeAs Structure”, Solid State Sci. 21 (2013) 100.

172.   T. M. M. Richter, S. Zhang, R. Niewa,„Ammonothermal Synthesis of Dimorphic K2[Zn(NH2)4]”, Z. Kristallogr. 228 (2013) 351.

173.   S. Zhang, F. Hintze, W. Schnick, R. Niewa,„Intermediates in Ammonothermal GaN Crystal Growth Under Ammonoacidic Conditions”, Eur. J. Inorg. Chem. (2013) 5387.      

174.   M. Widenmeyer, T. C. Hansen, R. Niewa,„Formation and decomposition of metastable α´´-Fe16N2 from in situ powder neutron diffraction and thermal analysis”, Z. Anorg. Allg. Chem. 639 (2013) 2851.

175.   S. Pfeiffer, M. Bischoff, R. Niewa, B. Clauß, M. R. Buchmeiser,„Structure Formation in Yttrium Aluminum Garnet (YAG) Fibers”, J. Eur. Ceram. Soc. 34 (2014) 1321.   

176.   L. Shlyk, K. K. Wolff, M. Bischoff, E. Rose, Th. Schleid, R. Niewa,„Crystal structure and superconducting properties of hole-doped Ca0.89Na0.11FFeAs single crystals” Supercond. Sci. Technol. 27 (2014) 044011.

177.   K. Guo, D. Rau, W. Schnelle, U. Burkhardt, R. Niewa, U. Schwarz,„High-Pressure–High-Temperature Synthesis of ε-Fe2IrN0.24”, Z. Anorg. Allg. Chem. 640 (2014) 814.

178.   T. M. M. Richter, R. Niewa,„Chemistry of Ammonothermal Synthesis”, Inorganics 2 (2014) 29.

179.   M. Widenmeyer, T. C. Hansen, E. Meissner, R. Niewa,„Formation and decomposition of iron nitrides observed by in situ powder neutron diffraction and thermal analysis”, Z. Anorg. Allg. Chem. 640 (2014) 1265.       

180.   S. Zhang, N. S. A. Alt, E. Schlücker, R. Niewa,„Novel Alkali Metal Amidogallates as Intermediates in Ammonothermal GaN Crystal Growth”, J. Crystal Growth 403 (2014) 22.

181.   K. K. Wolff, L. Shlyk, M. Bischoff, R. Niewa, Th. Schleid,„Synthesis and Crystal Growth of Superconducting Hole-doped Ca1–xNaxFFeAs”, Materials 7 (2014) 1984.

182.   P. Eckold, R. Niewa, W. Hügel,„Texture of electrodeposited tin layers and its influence on their corrosion behavior”, Microelectron. Reliab. 54 (2014) 2578.

183.   L. Shlyk, M. Bischoff, E. Rose, R. Niewa,„Superconductivity at Tc = 36.5 K in Na-substituted SrFe2As2 Single Crystals”, Adv. Sci. Techn. 95 (2014) 150.

184.   M. Widenmeyer, E. Meissner, A. Senyshyn, R. Niewa,„On the formation mechanism of chromium nitrides: An in situ study” Z. Anorg. Allg. Chem. 640 (2014) 2801.

185.   D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, S. Nemrava, M. Bischoff, N. S. Perov, A. S. Semisalova, I. V. Krivtsov, L. I. Isaenko, G. G. Mikhailov, R. Niewa,„Growth, Structural and Magnetic Characterization of Al-substituted Barium Hexaferrite Single Crystals”, J. Alloys Compd. 615 (2014) 1043.

186.   D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, S. Nemrava, N. S. Perov, A. S. Semisalova, I. V. Krivtsov, L. I. Isaenko, G. G. Mikhailov, R. Niewa,„Ti-Substituted BaFe12O19 Single Crystal Growth and Characterization”, Cryst. Growth & Design 14 (2014) 5834.

187.   D. A. Vinnik, D. A. Zherebtsov, R. Niewa, L. I. Isaenko, G. G. Mikhailov,„Distribution of Dopant Metals between PbTiO3 Crystals and PbO–B2O3 Flux”, Russ. J. Gen. Chem. 84 (2014) 1888, Zhur. Obshch. Khim. 84 (2014) 1607.

188.   B. Hertweck, S. Zhang, T. G. Steigerwald, N. S. A. Alt, R. Niewa, E. Schlücker,„Applicability of metals as liner materials for the ammonoacidic crystal growth”, Chem. Eng. Technol. 11 (2014) 1835.

189.   T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,„Ammonothermal Synthesis of Li4[Zn(NH2)4](NH2)2 and Cs2[Zn(NH2)4]”, Z. Anorg. Allg. Chem. 640 (2014) 2386.

190.   J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,„SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis”, Z. Anorg. Allg. Chem. 641 (2015) 234.

191.   D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, S. Nemrava, A. S. Semisalova, D. M. Galimov, S. A. Gudkova, I. V. Chumakov L. I. Isaenko, R. Niewa,„Growth, Structural and Magnetic Characterization of Co- and Ni-substituted Barium Hexaferrite Single Crystals”, J. Alloys Compd. 628 (2015) 480.

192.   P. Woidy, A. J. Karttunen, M. Widenmeyer, R. Niewa, F. Kraus,„On Copper(I) Fluorides, the Cuprophilic Interaction, the Preparation of Copper Nitride at Room Temperature and the Formation Mechanism at Elevated Temperature”, Chem. Eur. J. 21 (2015) 3290.

193.   M. Widenmeyer, L. Shlyk, A. Senyshyn, R. Mönig, R. Niewa,„Structural and magnetic characterization of single-phase sponge-like bulk α’’-Fe16N2”, Z. Anorg. Allg. Chem. 641 (2015) 348.

194.   S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, P. Wellmann,„Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution”, J. Cryst. Growth 418 (2015) 64.

195.   D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, S. Nemrava, A. K. Yakushechkina, A. S. Semisalova, S. A. Gudkova, A. N. Anikeev, N. S. Perov, L. I. Isaenko, R. Niewa,„Tungsten Substituted BaFe12O19 Single Crystal Growth and Characterization”, Mater. Chem. Phys. 155 (2015) 99.

196.   T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,„Ammonothermal synthesis and characterization of Li4[Zn(NH2)4](NH2)2”, Z. Anorg. Allg. Chem. 641 (2015) 1016.

197.   D. A. Vinnik, A. Tarasova, D. A. Zherebtsov, L. S. Mashkovtseva, I. V. Chumanov, S. Nemrava, A. K. Yakushechkina, A. S. Semisalova, N. S. Perov, L. I. Isaenko, R. Niewa,„Cu-substituted barium hexaferrite crystal growth and characterization”, Ceramics Int. 41 (2015) 9172.

198.   J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,„SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis”, Z. Kristallogr. Suppl. 35 (2015) 80.

199.   D. Stoiber, R. Niewa,„Structural Distortion in the Compounds (A3N)As (A = Mg, Ca, Sr, Ba)”, Z. Kristallogr. Suppl. 35 (2015) 83.

200.   C. W. Ney, R. Niewa,„Composition dependent transitions from cubic to tetragonal in Li7+xTexI1–xN2”, Z. Kristallogr. Suppl. 35 (2015) 86.

201.   P. Eckold, W. Hügel, R. Niewa,„Two Modifications of Tin(II) Bromide”, Z. Kristallogr. Suppl. 35 (2015) 102.

202.   S. Nemrava, D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, N. S. Perov, A. S. Semisalova, I. V. Krivtsov, L. I. Isaenko, G. G. Mikhailov, R. Niewa,„Ti-Substituted BaFe12O19 Single Crystal Growth and Characterization”, Z. Kristallogr. Suppl. 35 (2015) 125.

203.   S. Nemrava, D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, M. Bischoff, N. S. Perov, A. S. Semisalova, I. V. Krivtsov, L. I. Isaenko, G. G. Mikhailov, R. Niewa,„Growth, Structural and Magnetic Characterization of Al-Substituted barium hexaferrite Single Crystals”, Z. Kristallogr. Suppl. 35 (2015) 128.

204.   T. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,„Trigonal bipyramidal coordination of Zn2+ in Zn(NH3)2F2 and Zn(NH3)3F2”, Z. Kristallogr. Suppl. 35 (2015) 135.

205.   P. Eckold, M. Rolff, R. Niewa, W. Hügel,„Synthesis, Characterization and in situ Raman Detection of Sn3O2(OH)2−xClx Phases as Intermediates in Tin Corrosion”, Corros. Sci. 98 (2015) 399.

206.   P. Eckold, W. Hügel, R. E. Dinnebier, R. Niewa,„Two Modifications of Tin(II) Bromide”, Z. Anorg. Allg. Chem. 641 (2015) 1467.

207.   S. Söllradl, M. Greiwe, V. Bukas, M. R. Buchner, M. Widenmeyer, T. Kandemir, T. Zweifel, A. Senyshyn, S. Günther, T. Nilges, A. Tuerler, R. Niewa,„Bulk Nitrogen-Doping in ZnO via Combustion Synthesis?”, Chem. Mater. 27 (2015) 4188.

208.   D. A. Vinnik, A. B. Ustinov, D. A. Zherebtsov, V. V. Vitko, S.A. Gudkova, I. Zakharchuk, E. Lähderanta, R. Niewa,„Structural and millimeter-wave characterization of flux grown Al substituted barium hexaferrite single crystals”, Ceramics Int. 41 (2015) 12728.          

209.   D. A. Vinnik, A. S. Semisalova, L. S. Mashkovtseva, A. K. Yakushechkina, S. Nemrava, S. A. Gudkova, D. A. Zherebtsov, N. S. Perov, L. I. Isaenko, R. Niewa,„Growth, Structural and Magnetic Characterization of Zn-substituted Barium Hexaferrite Single Crystals”, Mater. Chem. Phys. 163 (2015) 416.

210.   M. Widenmeyer, C. Wessel, R. Dronskowski, R. Niewa,„V16N1.5: Metastable or Missing in the Binary Phase Diagram?”, Z. Anorg. Allg. Chem. 641 (2015) 2610.

211.   L. Shlyk, D. A. Vinnik, D. A. Zherebtsov, Z. Hu, C.-Y. Kuo, C.-F. Chang, H.-J. Lin, L.-Y. Yang, A. S. Semisalova, N. S. Perov, T. Langer, R. Pöttgen, S. Nemrava, R. Niewa,„Single Crystal Growth, Structural Characteristics and Magnetic Properties of Chromium Substituted M-Type Ferrites”, Solid State Sci. 50 (2015) 23.

212.   H. Cao, T. M. M. Richter, C. Pistidda, A.-L. Chaudhary, A. Santoru, G. Gizer, R. Niewa, P. Chen, T. Klassen, M. Dornheim,„Alkali metal amidozincates for hydrogen storage”, ChemSusChem 8 (2015) 3777.

213.   P. Eckold, M. S. Sellers, R. Niewa, W. Hügel,„The surface energies of β-Sn − A new concept for corrosion and whisker mitigation”, Microelectron. Reliab. 55 (2015) 2799.

214.   D. A. Vinnik, S. A. Gudkova, R. Niewa,„Growth of lead and aluminum substituted barium hexaferrite single crystals from lead oxide flux”, Mater. Sci. Forum 843 (2016) 3.

215.   S. Pfeifer, P. Demirci, R. Duran, H. Stolpmann, A. Renfftlen, S. Nemrava, R. Niewa, B. Clauß, M. R. Buchmeiser, „Synthesis of zirconia toughened alumina (ZTA) fibers for high performance materials”, J. Eur. Ceram. Soc. 36 (2016) 725.

216.   M. Widenmeyer, C. Peng, A. Baki, W. Xie, R. Niewa, A. Weidenkaff,„Approaching Compositional Limits of Perovskite-type Oxides and Oxynitrides by Synthesis of Mg0.15Ca0.75Y0.1Ti(O,N)3, Ca1–xYxZr(O,N)3 (0.1 ≤ x ≤ 0.4), and Sr1–xLaxZr(O,N)3 (0.1 ≤ x ≤ 0.4)”, Solid State Sci. 54 (2016) 7.

217.   T. M. M. Richter, S. Le Tonquesse, N. S. A. Alt, E. Schlücker, R. Niewa,„Trigonal-Bipyramidal Coordination in First Ammoniates of ZnF2: ZnF2(NH3)3 and ZnF2(NH3)2”, Inorg. Chem. 55 (2016) 2488.

218.   J. Hertrampf, N. Alt, E. Schlücker, R. Niewa,„Ammonothermal Synthesis and Crystal Growth of Indium Nitride”, Z. Kristallogr. Suppl. 36 (2016) 73.

219.   T. Lehmann, R. Niewa,„Electrochemical formation of metal nitride surface layers in molten salt systems”, Z. Kristallogr. Suppl. 36 (2016) 85.

220.   D. Stoiber, P. Höhn, R. Niewa,„Nitrogen Ordering in Inverse Perovskite Nitrides”, Z. Kristallogr. Suppl. 36 (2016) 90.

221.   T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,„Subsequent condensation in [Zn2(NH3)2(NH2)3]Cl and [Zn(NH3)2(NH2)]Br: towards ammonothermal crystal growth of Zn3N2”, Z. Kristallogr. Suppl. 36 (2016) 90.

222.   S. Nemrava, D. Vinnik, I. Zakharchuk, E. Lähderanta, R. Niewa,„Crystal Growth and Characterization of Mn-substituted Barium Hexaferrites BaFe12–xMnxO19”, Z. Kristallogr. Suppl. 36 (2016) 147.

223.   S. Nemrava, L. Link, B. Blaschkowski, R. Niewa,„Crystal Growth and Characterization of BaMRu5O11 (M = Li, Cu)”, Z. Kristallogr. Suppl. 36 (2016) 147.

224.   H. Cao, A. Santoru, C. Pistidda, T. M. M. Richter, A.-L. Chaudhary, G. Gizer, R. Niewa, P. Chen, T. Klassen, M. Dornheim,„New synthesis route for ternary transition metal amides as well as ultrafast amide-hydride hydrogen storage materials”, Chem. Comm. 52 (2016) 5100.

225.   D. A. Vinnik, D. A. Zherebtsov, S. A. Gudkova, R. Niewa, N. S. Zabeivorota, F. V. Podgornov,„Broadband impedance spectroscopic characterization of PbTiO3 crystal grown by spontaneous crystallization from flux method”,   Ceramics Int. 42 (2016) 10787.

226.   D. A. Vinnik, S. A. Gudkova, R. Niewa,„Barium hexaferrite single crystal growth using PbO and Na2O based flux”, Mater. Sci. Forum 870 (2016) 66.

227.  J. Hertrampf, N. S. A. Alt, E. Schlücker, M. Knetzger, E. Meissner, R. Niewa,„Ammonothermal synthesis of GaN using Ba(NH2)2 as mineralizer”, J. Cryst. Growth 456 (2016) 2.

228.   M. Widenmeyer, L. Shlyk, N. Becker, R. Dronskowski, E. Meissner, R. Niewa,„Synthesis of metastable Co4N, Co3N, Co2N and CoO0.74N0.24 from a single azide precursor and intermediates in ammonolysis of CoBr2”, Eur. J. Inorg. Chem. (2016) 4792.

229.   T. Cichorek, Ł. Bochenek, M. Schmidt, A. Czulucki, G. Auffermann, F. Steglich, R. Kniep, R. Niewa, S. Kirchner,„Two-channel Kondo physics driven by arsenic bond fluctuations”, Phys. Rev. Let. 117 (2016) 106601.

230.   T. M. M. Richter, S. Strobel, N. S. A. Alt, E. Schlücker, R. Niewa,„Ammonothermal synthesis and crystal structures of diamminetriamidodizinc chloride [Zn2(NH3)2(NH2)3]Cl and diamminemonoamidozinc bromide [Zn(NH3)2(NH2)]Br”, Inorganics 4 (2016) 41.

231.   T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,„Ammonothermal Synthesis and Characterization of Cs2[Zn(NH2)4]”, Z. Anorg. Allg. Chem. 642 (2016) 1207.

232.   L. Shlyk, M. Bischoff, E. Rose, R. Niewa,„Growth, magnetic and transport properties of Li doped SrFe2As2 single crystals”, Phys. Status Solidi B 254 (2017) 1600118.

233.   J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,„Three Solid Modifications of Ba[Ga(NH2)4]2: A Soluble Intermediate in Ammonothermal GaN Crystal Growth”, Eur. J. Inorg. Chem. (2017) 902.

234.   W. P. Clark, S. Steinberg, R. Dronskowski, C. McCammon, I. Kupenko,M. Bykov, L. Dubrovinsky, L. G. Akselrud, U. Schwarz, R. Niewa,„Novel High-pressure Polymorph of NiAs-Type FeN”, Z. Kristallogr. Suppl. 37 (2017) 138.

235.   L. Shlyk, L. E. De Long, R. Niewa,„Structure, Magnetic and Transport Properties of SrNiRu5O11 Single Crystals:
A New R-type Ferrite with Ordered Kagome Nets”, Phys. Rev. B 95 (2017) 024433.

236.   H. Cao, C. Pistidda, T. M. M. Richter, A. Santoru, C. Milanese, S. Garroni, J. Bednarcik, A.-L. Chaudhary, G. Gizer, H.-P. Liermann, R. Niewa, P. Chen, T. Klassen, M. Dornheim,„In situ X-ray diffraction study of the super-fast re-hydrogenation of K2[Zn(NH2)4]-8LiH”, J. Phys. Chem. C 121 (2017) 1546.

237.   S. Nemrava, D. A. Vinnik, Z. Hu, M. Valldor, C.-Y. Kuo, D. A. Zherebtsov, S. A. Gudkova, C.-T. Chen, L. H. Tjeng, R. Niewa,„Three Oxidation States of Mn in the Barium Hexaferrite BaFe12–xMnxO19”, Inorg. Chem. 56 (2017) 3861.

238.   W. P. Clark, S. Steinberg, R. Dronskowski, C. McCammon, I. Kupenko, M. Bykov, L. Dubrovinsky, L. G. Akselrud, U. Schwarz, R. Niewa,„NiAs-artige Hochdruck-Modifikation von FeN”, Angew. Chem. 129 (2017) 7408. „High-pressure NiAs-Type Modification of FeN”, Angew. Chem. Int. Ed. 56 (2017) 7302.

239.   T. Cichorek, L. Bochenek, M. Schmidt, A. Czulucki, G. Auffermann, R. Kniep, R. Niewa, F. Steglich, S. Kirchner,„Reply to Comment on Two-channel Kondo physics due to As vacancies in the layered compound ZrAs1.58Se0.39”, Phys. Rev. Lett. 118 (2017) 259702.

240.   G. Büttner, S. Populoh, W. Xie, M. Trottmann, J. Hertrampf, M. Döbeli, L. Karvonen, S. Yoon, P. Thiel, R. Niewa, A. Weidenkaff,„Thermoelectric properties of [Ca2CoO3–δ][CoO2]1.62 as a function of Co/Ca ratio and Co3O4 inclusions”, J. Appl. Phys. 121 (2017) 215101.

241.   D. A. Vinnik, A. Yu. Tarasova, D. A. Zherebtsov, S. A. Gudkova, D. M. Galimov, V. E. Zhivulin, S. Nemrava, N. S. Perov, L. I. Isaenko, R. Niewa,„Magnetic and structural properties of barium hexaferrite from various growth techniques”, Materials 10 (2017) 578.

242.   H. Cao, J. Guo, F. Chang, C. Pistidda, W. Zhou, X. Zhang, A. Santoru, H. Wu, N. Schell, R. Niewa, P. Chen, T. Klassen, M. Dornheim,„Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition”, Chem. Eur. J. 23 (2017) 9766.

243.   J. Hertrampf, E. Schlücker, D. Gudat, R. Niewa,„Dissolved Intermediates in Ammonothermal Crystal Growth: Stepwise Condensation of [Ga(NH2)4] towards Ga”, Cryst. Growth & Design 17 (2017) 4855.

244.   D. Stoiber, M. Bobnar, P. Höhn, R. Niewa,„Lithium alkaline earth tetrelides of the type Li2EaTt (Ea = Ca, Ba, Tt = Si, Ge, Sn, Pb): Synthesis, Crystal Structures and Physical Properties”, Z. Naturforsch. B 72 (2017) 847.

245.   D. A. Vinnik, I. A. Ustinov A. B. Ustinov, D. A. Zherebtsov, S.A. Gudkova, E. A. Trofimov, N. S. Zabeivorota, G. G. Mikhailov, R. Niewa,„Millimeter-wave characterization of aluminium-substituted barium lead hexaferrite single crystals grown from PbO–B2O3 flux”, Ceramics Int. 43 (2017) 15800.          

246.   M. Pathak, D. Stoiber, M. Bobnar, A. Ovchinnikov, A. Ormeci, R. Niewa, P. Höhn,„Synthesis, Characterization and Chemical Bonding Analysis of the Lithium Alkaline-earth Metal Gallide Nitrides Li2(Ca3N)2[Ga4]  and Li2(Sr3N)2[Ga4]”, Z. Allg. Anorg. Chem. 643 (2017) 1557.

247.   M. Widenmeyer, T. C. Hansen, A. Leineweber, A. Weidenkaff, R. Niewa,„Nitrogen Transfer between Solid Phases in the System Mn–N Detected via in situ Neutron Diffraction”, Z. Anorg. Allg. Chem. 643 (2017) 1929.

248. D. A. Vinnik, A. S. Chernukha, S. A. Gudkova, V. E. Zhivulin, E. A. Trofimov, A. Y. Tarasova, D. A. Zherebtsov, M.Kalandija, A. V. Trukhanov, S. V. Trukhanov, A. V. Senin, L. I. Isaenko, N. S. Perov, R. Niewa, „Morphology and magnetic properties of pressed barium hexaferrite BaFe12O19 materials”, J. Magn. Magn. Mater. 459 (2018) 131.

249.   M. Pathak, D. Stoiber, M. Bobnar, A. Ormeci, Y. Prots, R. Niewa, P. Höhn, „The Inverse Perovskite Nitrides (Sr3N2/3–x)Sn, (Sr3N2/3x)Pb, and (Sr3N)Sb: Flux Crystal Growth, Crystal Structures and Physical Properties”, Z. Allg. Anorg. Chem. 644 (2018) 161.

250.   L. Shlyk, S. Strobel, B. Farmer, L. E. DeLong, R. Niewa, „Coexistence of ferromagnetism and  spin glass freezing in the site-disordered kagome ferrite SrSn2Fe4O11”, AIP Advances 8 (2018) 055708.

251.   L. Shlyk, S. Strobel, B. Farmer, L. E. DeLong, R. Niewa, „Coexistence of ferromagnetism and unconventional spin-glass freezing in the site-disordered kagome ferrite SrSn2Fe4O11”, Phys. Rev. B 97 (2018) 054426.

252.  J. Hertrampf, P. Becker, M. Widenmeyer, A. Weidenkaff, E. Schlücker, R. Niewa, „Ammonothermal Crystal Growth of Indium Nitride”, Cryst. Growth & Design 18 (2018) 2365.

253.   S. Nemrava, L. Link, Z. Hu, B. Blaschkowski, S. C. Liao, H. J. Lin, C. T. Chen, T. S. Chan, L. H. Tjeng, R. Niewa, „Synthesis and Characterization of BaLiRu5O11, BaCu1+xRu5–xO11 and BaLi1–xCuxRu5–δO11”, Z. Anorg. Allg. Chem. 644 (2018) 1691.

254.   W. P. Clark, R. Niewa, „Li and Co ordering in the nitridocobaltate(I) SrLi2{Li[CoN2]}”, Crystals 8 (2018) 268.

255.   S. Schimmel, P. Duchstein, T. G. Steigerwald, A.-C. L. Kimmel, E. Schlücker, D. Zahn, R. Niewa, P. Wellmann, „Transport and chemistry of Ga-containing intermediates investigated by in situ x-ray monitoring of GaN dissolution”, J. Cryst. Growth 498 (2018) 214.

256.   D. A. Vinnik, L. S. Mashkovtseva, S. A. Gudkova, E. A. Trofimov, D. A. Zherebtsov, A. V. Trukhanov, S. V. Trukhanov, S. Nemrava, B. Blaschkowski, R. Niewa, „Flux single crystal growth of M-type strontium hexaferrite SrFe12O19 by spontaneous crystallization”, J. Magn. Magn. Mater. 470 (2019) 97.

257.   D. Stoiber, R. Niewa,„Perovskite-distortion inverted: Crystal structures of (A3N)As (A = Mg, Ca, Sr, Ba)”, Z. Anorg. Allg. Chem. 645 (2019) 329.

258.   D. Stoiber, R. Niewa,„PolyDis: simple quantification tool for distortion of polyhedra in crystalline solids”, Z. Kristallogr. 234 (2019) 201.

259.   T. S. Lehmann, R. Niewa, „Electrochemical synthesis of highly nitrogen containing γ-FeN0.13 and ε-Fe3N1.51 in a molten salt system”, Eur. J. Inorg. Chem. (2019) 730.

260.   T. S. Lehmann, B. Blaschkowski, R. Niewa, „Electrochemical bulk synthesis of ternary nitride perovskites: Co3InN and Ni3InN”, Eur. J. Inorg. Chem. (2019) 1709.

261.   M. R. Amin, T. de Boer, A. Moewes, P. Becker, J. Hertrampf, R. Niewa, „Studying the effects of oxygen impurities and impurity phases on band gap and electronic structure of ammonothermal InN: Experiment and Theory”, J. Phys. Chem. C 123 (2019) 8943.

262.   D. A. Zherebtsov, M. U. Schmidt, R. Niewa, C. P. Sakthidharan, F. V. Podgornov, Y. V. Matveichuk, S. A. Nayfert, M. A. Polozov, S. N. Ivashevskaya, A. I. Stash, Y.-S. Chen, D. E. Zhivulin, V. E. Zhivulin, S. V. Merzlov, E. V. Bartashevich, V. V. Avdin, H. S. Hsu, F. W. Guo, „Two new polymorphs of cis-perinone: crystal structures, physical and electric properties”, Acta Crystallogr. B 75 (2019) 384.

263. L. Link, Y. Lin, R. Niewa, „Two New Nitridogermanates: Sr4[GeN4] and Sr12Ge2[GeN3]2[GeN4]2” Z. Kristallogr. Suppl. 39 (2019) 90.

264. D. A. Vinnik, E. A. Trofimov, V. E. Zhivulin, O. V. Zaitseva, S. A. Gudkova, A. Y. Starikov, D. A. Zherebtsov, A. A. Kirsanova, M. Häßner, R. Niewa, „High-entropy oxide phases with magnetoplumbite structure” Ceramics Int. 45 (2019) 12942.

265. Schwarz, K. Guo, W. P. Clark, U. Burkhardt, M. Bobnar, R. Castillo, L. Akselrud, R. Niewa, „Ferromagnetic e-Fe2MnN: high-pressure synthesis, hardness and magnetic properties” Materials 12 (2019) 1993.

266. T. S. Lehmann, B. Blaschkowski, R. Niewa, „Electrochemical synthesis of transition metal oxide nitrides with ε-TaN, δ-NbN and γ´-Mo2N structure type in a molten salt system” Z. Naturforsch. B im Druck.

267. R. Niewa, „Metal-Rich Ternary Perovskite Nitrides” Eur. J. Inorg. Chem. (2019) 3647.

268. W. P. Clark, R. Niewa, „Synthesis and characterisation of the nitridocuprate(I) nitride carbodiimide
Sr6N[CuN2][CN2]2” Z. Anorg. Allg. Chem. im Druck.

269. W. P. Clark, A. Köhn, R. Niewa, „Das quasi-binäre Acetonitriltriid Sr3[C2N]2” Angew. Chem. im Druck. „The quasi-binary acetonitriletriide Sr3[C2N]2” Angew. Chem. Int. Ed. im Druck.

270. C. M. Schurz, R. Niewa, T. Schleid, „LiLa4N2I7 as the First Lithium-Containing Nitride Halide of the Lanthanides: Synthesis, Crystal Structure and Spectroscopic Characterization” Solid State Sci. im Druck.

Patente

1.    L. Shlyk, S. Kryukov, L. E. De Long, B. Schüpp-Niewa, R. Niewa,„A Novel Class of Ferromagnetic Semiconductors”, U.S. Patent No. 8,357,309, erteilt am 22.01.2013.

Bücher und Buchbeiträge

1.  T. M. M. Richter, R. Niewa, Chemistry of Ammonothermal Synthesis, in D. Gregory (Ed.): Innovative Inorganic Synthesis, MDPI AG Basel, Schweiz, 2015, pp. 73. ISBN 978-3-03842-067-5, ISBN 978-3-03842-066-8.

2. D. A. Vinnik, S. A. Gudkova, R. Niewa, Growth of lead and aluminum substituted barium hexaferrite single crystals from lead oxide flux, in A. A. Radionov (Ed.): Materials Engineering and Technologies for Production and Processing, Chapter 1: New Functional Materials and Elements of Technologies, Trans Tech Publications Ltd., Zürich, Schweiz, 2016, pp. 3. ISBN 978-3-03835-681-3, doi: 10.4028/www.scientific.net/MSF.843.

3. P. Höhn, R. Niewa, Nitrides of Non-Maingroup Elements, in R. Dronskowski, S. Kikkawa, A. Stein (Eds.): Handbook of Solid State Chemistry, Volume 1: Materials and Structure of Solids, Wiley-VCH, Weinheim, Deutschland, 2017, pp. 251. ISBN 978-3-527-32587-0.

Konferenzbeiträge

GDCh-Tagung Festkörperchemie als Grundlage der Materialforschung
31. August - 2. September 1994, Universität Bonn, Deutschland.
       H. Jacobs, D. Ostermann, R. Niewa
„Alkalimetallnitridometallate der Metalle der 6. Nebengruppe”
 
Gordon Research Conference Solid State Chemistry
21. - 26. September 1997, The Queen‘s College, Oxford, GB.
       R. Niewa, F. J. DiSalvo, D.-K. Yang, D. B. Zax
„Synthesis, Crystal Structure and Properties of a Lithium Manganese Nitride, (Li, Mn)2N”
       R. Niewa, G. V. Vajenine, F. J. DiSalvo
„Unusual Bonding in Ternary Nitrides: Preparation, Structure and Properties of Ce2MnN3
 
GDCh-Tagung Syntheseprinzipien in der Festkörperchemie
23. – 25. September 1998, Universität des Saarlandes, Saarbrücken, Deutschland.
       R. Niewa, F. J. DiSalvo
„Neue Nitridocuprate(I): Ba[CuN], Ba16[(CuN)8][Cu2N3][Cu3N4] und Ca4Ba[CuN2]2
 
ECSSC’99, VIIth European Conference on Solid State Chemistry
15. – 19. September 1999, Universidad Complutense, Madrid, Spanien.
       P. Höhn, R. Niewa, M. Ludwig, R. Kniep
„Nitride-Azides: Intermediates during Nitride Formation?”
SCTE2000: 13th International Conference on Solid Compounds of Transition Elements
4. – 7. April 2000, Università di Genova, Stresa, Italien.
       O. Sichevich, R. Ramlau, R. Giedigkeit, M. Schmidt, R. Niewa, Y. Grin
„EuGa2 and some related compounds: structure and bonding”
 
GDCh-Tagung Anorganische Funktionsmaterialien
27. – 29. September 2000, Westfälische Wilhelms-Universität Münster, Deutschland.
       R. Niewa, W. Schnelle, F. R. Wagner
„Kristallstruktur und Eigenschaften von (Ca3N)Tl”
       J. Klatyk, F. R. Wagner, R. Niewa, R. Kniep
„Ca{Li2[MnIN]2}: Kristallchemischer Brückenschlag zwischen Lithium-Nitridoverbindungen und Borid-Carbiden des Typs M[B2C2]”
 
9. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
12. – 15. März 2001, Universität Bayreuth, Deutschland.
       Yu. M. Prots‘, R. Niewa, W. Schnelle
„Neue ternäre Erdalkali-Cer(IV)-nitride: CaCeN2 und SrCeN2
 
ECSSC 8, 8“ European Conference on Solid State Chemistry
4. – 7. Juli 2001, University of Oslo, Norwegen.
       R. Niewa, F. R. Wagner, W. Schnelle, O. Hochrein, R. Kniep
„Li24[MnN3]3N2 and Li5[(Li1–xMnx)N]3, Two Intermediates in the Decomposition Process of Li7[MnN4]
to Li2[(Li1–xMnx)N]”
 
HASYLAB users' meeting Research with Synchrotron Radiation
24. – 25. Januar 2002, HASYLAB, DESY, Hamburg, Deutschland.         
       R. Niewa, Z. Hu, C. Grazioli, U. Rößler, M. S. Golden, M. Knupfer, J. Fink, H. Giefers, G. Wortmann,
       F. M. F. de.  Groot
„XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, Mn-L2,3 and N-K thresholds”
      U. Schwarz, R. Niewa, Z. Hu, K. Klementiev, M. Hanfland, R. Giedigkeit, W. Schnelle, M. Schmidt, Yu. Grin
„Pressure-induced Oxidation State Change of Ytterbium in YbGa2
 
Frühjahrstagung des Arbeitskreises Festkörperphysik (AKF) der Deutschen Physikalischen Gesellschaft (DPG)
11. – 15. März 2002, Universität Regensburg, Deutschland.
       W. Schnelle, R. Niewa, F. R. Wagner, R. Kniep
„Magnetische Eigenschaften von Lithium-Nitridometallaten Li2[(Li1–xTIx)N] (T = Mn, Fe, Co, Ni, Cu)”
 
GDCh-Tagung Nichtstöchiometrische Festkörper – Grundlagen und Anwendungen
24. – 26. September 2002, Technische Universität Dresden, Deutschland.
       M. Kirchner, R. Niewa, W. Schnelle, F. R. Wagner, D. Walther, R. Kniep
„Seltenerdnitride des Indiums (R3N)In”
       R. Niewa, D. Zherebtsov, R. Kniep
„Zur Polymorphie von Li7[VN4]”
 
HASYLAB users' meeting Research with Synchrotron Radiation, Satellite meeting XAFS
30. – 31. Januar 2003, HASYLAB, DESY, Hamburg, Deutschland.         
       R. Niewa, Z. Hu, W. Schnelle
„Chemistry, Physical Properties and K-Edge Spectroscopy on Nitridometalates of the 3d-Elements”(eingeladener Vortrag)
 
Euregionale 2003, JCH-Frühjahrssymposium
27. Februar – 01. März 2003, Technische Universität Dresden, Deutschland.
       M. Kirchner, W. Schnelle, F. R. Wagner, R. Niewa
„Synthesis and physical properties of rare-earth nitrides (R3N)In”
 
TMS Annual Meeting, Symposium: Materials processing under influence of electrical and magnetic fields
03. – 06. März 2003, San Diego Convention Center, USA.
       J. Schmidt, R. Niewa, M. Schmidt, Yu. Grin
„Decomposition of MgH2 by SPS”
 
ADUC 2003, Chemiedozententagung
16. – 19. März 2003, Technische Universität Chemnitz, Deutschland.
       R. Niewa, M. Kirchner
„Metallreiche Seltenerd-Nitride”
 
Frühjahrstagung des Arbeitskreises Festkörperphysik (AKF) der Deutschen Physikalischen Gesellschaft (DPG)
24. – 28. März 2003, Technische Universität Dresden, Deutschland.
       V. A. Ivanshin, R. Niewa, W. Schnelle, J. Sichelschmidt, R. Kniep
„Magnetic and electron-spin-resonance properties of nitridometalates(I)”
 
First Bilateral Workshop Current topics in advanced materials
19. – 20. Mai 2003, Koç University, Istanbul, Türkei.
       R. Niewa
„Composition Tuning of Rare-Earth Systems (R3Zx)M
 
ICM 2003, International Conference on Magnetism
28. Juli – 1. August 2003, Rom, Italien.
       W. Schnelle, R. Niewa, F. R. Wagner
„Magnetic and Electronic Properties of Lithium Nitridometalates Li2[(Li1–xTIx)N] (T = Mn, Fe, Co, Ni, Cu)”
 
Workshop, Hochdruckkristallographie und -synthese
28. – 29. August 2003, MPI-CPfS Dresden, Deutschland.
       R. Niewa
„XAS Spectroscopy under Pressure – Valence Transitions of Rare-earth Metals”
 
ECSSC 9, 9th European Conference on Solid State Chemistry
03. – 06. September 2003, Universität Stuttgart, Deutschland.
       R. Niewa, D. Zherebtsov, S. Leoni
„Li3[ScN2]: The First Nitridoscandate”
       L. Vasylechko, R. Niewa, W. Schnelle, A. Senyshyn, M. Knapp
„Crystal Structures, Thermal Expansion and Phase Transitions of CeAlO3 and CeGaO3
       L. Vasylechko, D. Savytskii, A. Senyshyn, A. Matkovskii, M. Berkowski, V. Vashook, R. Niewa,
       C. Bähtz, U. Bismayer
„LSGM Single Crystals: Crystal Structure, Thermal Expansion, Phase Transitions and Conductivity”
       U. Schwarz, R. Cardoso-Gil, M. Schmidt, W. Schnelle, R. Niewa, K. Klementiev
„Electronic state of rare-earth metals in binary and ternary compounds at high pressures”
 
GDCh-Jahrestagung Chemie 2003, Symposium der Fachgruppe Festkörperchemie und Materialforschung
07. – 11. Oktober 2003, LMU München und TU München, Deutschland.
       R. Niewa
„Nitridoscandate und Scandiumnitride” (eingeladener Vortrag)
       R. Niewa, D. Zherebtsov, W. Schnelle
„ScTaN2 – das erste ternäre Scandiumnitrid”
 
Second Bilateral Workshop Current Topics in Materials Research
19. – 21. Oktober 2003, Institute of Low Temperature and Structure Research, Wroclaw, Polen.
       R. Niewa
„Composition Tuning of Rare-Earth Systems (R3Zx)M”(eingeladener Vortrag)
 
ADUC 2004, Chemiedozententagung
08. – 10. März 2004, Universität Dortmund, Deutschland.
       R. Niewa
„Nitridoscandate und Scandiumnitride”
 
12. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
15. – 19. März 2004, Universität Jena, Deutschland.
       M. Kirchner, H. Zhang, R. Niewa
„Die Kristallstruktur von La16Al13
 
2nd International Workshop on Spinel Nitrides and Related Materials
05. – 10. September 2004, Rüdesheim am Rhein, Deutschland.
       R. Niewa
„Ternary nitrides of rare-earth and related metals”
 
GDCh-Tagung Struktur-Eigenschafts-Beziehungen
13. – 15. September 2004, Philipps-Universität Marburg, Deutschland.
       M. Kirchner, F. R. Wagner, W. Schnelle, R. Niewa
„Beiträge zur Verbindungsbildung im System Ca–In–N”
       F. Gäbler, M. Kirchner, W. Schnelle, H. Rosner, R. Niewa
„Perowskit-Nitride (A3Nx)E mit A = Sr, Ba und E = Sb, Bi (x = 1), E = Sn, Pb (x < 1)”
 
Workshop des Institute for Complex Adaptive Matter (I2CAM): Chemical Physics of Complex Adaptive Matter
06. – 09. Februar 2005, Schloß Ringberg, Deutschland.
       F. Gäbler, M. Kirchner, W. Schnelle, H. Rosner, R. Niewa
„Perovskite Nitrides (A3Nx)E with A = Sr, Ba and E = Sb, Bi (x = 1), E = Sn, Pb (x < 1)”
 
13. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
28. Februar – 04. März 2005, Universität zu Köln, Deutschland.
       J. P. A. Makongo, Yu. Prots, U. Burkhardt, R. Niewa, G. Kreiner
„Disorder and homogeneity range in the structure of the complex alloy phase Mg6Pd”
       A. Schlechte, M. Schmidt, T. Cichorek, P. Simon, Yu. Prots, Th. Doert, R. Niewa,F. Steglich, R. Kniep
„Ordnung und Unordnung in Phasen vom PbFCl-Typ im System Zr–As–Se”
        
ADUC 2005, Chemiedozententagung
06. – 09. März 2005, LMU München, Deutschland.
       R. Niewa
„Metallreiche Erdalkalimetall-Nitride des Indiums”
 
Mikrosymposium Synthesis and Characterization of New Materials
5. April 2005, TU München, Deutschland.
       R. Niewa
„Metal-Rich Nitrides and Nitridometalates – Synthesis, Crystal Structures, Properties and Chemical Bonding”(eingeladener Vortrag)
 
35ièmes Journées des Actinides
23. – 26. April 2005, Schloss Weikersdorf, Baden/Wien, Östereich.
       T. Cichorek, F. Weickert, P. Gegenwart, F. Steglich, M. Schmidt, R. Niewa, G. Auffermann, R. Kniep,
       A. Wojakowski, Z. Henkie
„Two-Channel Kondo Problem in ThAsSe and its Derivatives”
 
Workshop on Anomalous Phenomena in Strongly Correlated Electron Materials
19. – 21. Mai 2005, Institute of Low Temperature and Structure Research, Wroclaw, Polen.
       R. Niewa, Schmidt, T. Cichorek, A. Schlechte, Yu. Prots, F. Steglich, R. Kniep
„Order/Disorder in Ternary Phases of the Systems Zr–As–Se and Zr–As–Te”
       T. Cichorek, F. Weickert, P. Gegenwart, A. Sanchez, S. Paschen, F. Steglich, M. Schmidt, R. Niewa,
       A. Schlechte,R. Kniep, A. Wojakowski, Z. Henkie
„Two-Channel Kondo Problem in ThAsSe and its Derivatives”
 
ICQ9, International Conference on Quasicrystals
22. – 26. Mai 2005, Iowa State Universität, Ames, USA.
       J. P. A. Makongo, Yu. Prots, U. Burkhardt, R. Niewa, G. Kreiner
„A case study of complex metallic alloys: Structure and disorder phenomena of Mg–Pd compounds”
 
ECSSCX, 10th European Conference on Solid State Chemistry
29. August – 01. September 2005, University of Sheffield, GB.
       M. Kirchner, F. R. Wagner, W. Schnelle, R. Niewa
„Ternary compounds (Ce3Z)Al (Z = C, N, O) and the polymorphism of Ce3Al”
       A. Schlechte, R. Niewa, Y. Prots, M. Schmidt, and R. Kniep
„Structurally disordered phases in the system Zr–As–Te”
 
World of Perovskites, International Conference on Perovskites – Properties and Potential Applications
05. – 07. September 2005, Empa, Dübendorf, Schweiz.
       R. Niewa, F. Gäbler
„Stacking Engineering of Inverse Perovskites: Formation and Properties”
       L. Vasylechko, S. Fadyeev, R. Niewa, W. Schnelle, M. Knapp
„Phase diagrams of the CeAlO3REAlO3 (RE = La, Nd) systems”
 
361. WE-Heraeus-Seminar on Hydrogen Storage with Novel Nanomaterials
23. – 28. Oktober 2005, Bad Honnef, Deutschland.
       A. Comin, S. Doppiu, R. Niewa, L. Schultz, O. Gutfleisch
„Synthesis and characterization of Li-based alanates by high-pressure techniques”
Minerva School Frontiers in high-pressure research
02. – 07. März 2006, Kibbutz Ein-Guedi, Dead-Sea, Israel.
       A. Friedrich, E. Haussühl, B. Winkler, K. Knorr, S. Rath, A. Lieb, W. Schnick, U. Schwarz, R. Niewa,
       M. Armbrüster, W. Morgenroth, M. Hanfland
„High-pressure properties of CeIII4[Si4O3+xN7–x]Cl1–xOx, x ≈ 0.2”
 
GDCh-Tagung Modelierung in der Festkörper- und Materialchemie
21. – 22. September 2006, RWTH Aachen, Deutschland.
        A. Schlechte, R. Niewa, T. Cichorek, M. Schmidt, Yu. Prots, R. Kniep
„Beiträge zu ternären, metallischen Zr Pniktidchalkogeniden”
       F. Gäbler, R. Niewa
„Zur Strukturvielfalt inverser Perowskite”
 
15. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
6. – 09. März 2007, Universität Bremen, Deutschland.
        A. Schlechte, Yu. Prots, M. Schmidt, R. Niewa, Th. Doert, R. Kniep
„CeAsSe – Ein neues ternäres Seltenerd-Pniktidchalkogenid”
 
X International Conference on Crystal Chemistry of Intermetallic Compounds,
17 – 20 September 2007, L’viv, Ukraine.
       L. Vasylechko, Yu. Prots, R. Niewa, D. Trots, Yu. Grin
In situ diffraction investigation of compounds in the system Yb–Ni–Ga”
       T. Basyuk, L. Vasylechko, A. Fedorchuk, D. Trots, R. Niewa
„Phase diagrams of the PrAlO3-RAlO3 (R = La, Nd, Sm) pseudo-binary systems”
 
MMM 2007, 52nd Magnetism and Magnetic Materials Conference,
5. – 09. November 2007, Tampa, Florida, USA.
       L. Shlyk, L. E. De Long, S. A. Kryukov, B. Schüpp-Niewa, R. Niewa
„Structural, Magnetic and Transport Properties of a New Class of Ferromagnetic Semiconductors/Metals: Ba(Fe,Co)2+xRu4–xO11
 
Erstes FRM II User Meeting
30. Oktober 2007, FRM II, Garching, Deutschland
       A. Schlechte, R. Niewa, B. Petersen, M. Schmidt, R. Kniep,
„As–Se-order of ZrAs1.6Se0.4 from Single Crystal Neutron and X-ray Diffraction”
     
2007 MRS Fall Meeting, Conference of the Materials Research Society
26. – 30. November 2007, Boston, Massachusetts, USA.
       R. Niewa
„Semiconducting and Metallic Perovskite Nitrides: Structures and Properties”
       U. Schwarz, L. Akselrud, A. Wosylus, M. G. Tucker, M. Hanfland, K. Thirunavukkuarasu, C. Kuntscher, J. v. Appen,
       R. Droskowski, D. Rau, R. Niewa
„High-pressure Crystal Structure and Properties of Cu3N”
 
Frühjahrstagung des Arbeitskreises Festkörperphysik (AKF) der Deutschen Physikalischen Gesellschaft (DPG)
25. – 29. Februar 2008, Berlin, Deutschland.
       K. Thirunavukkuarasu, C. Kuntscher, D. Rau, R. Niewa
„Pressure-induced phase transition in Cu3N”
 
APS March Meeting 2008, Conference of the American Physical Society
10. – 14. März 2008, New Orleans, Louisiana, USA.
       L. Shlyk, L. E. De Long, S. A. Kryukov, B. Schüpp-Niewa, R. Niewa
„Structural, Magnetic and Transport Properties of a New Class of Ferromagnetic Semiconductors/Metals: (Ba,Sr)M2±xRu4±xO11 (M = Fe, Co)”
16. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
04. – 06. März 2008, Universität Erlangen, Deutschland.
       A. Schlechte, R. Niewa, B. Pedersen, M. Schmidt, H. Borrmann, R. Kniep
„As–Se-order of ZrAs1.6–δSe0.4 from Single Crystal Neutron and X-ray Diffraction”
 
9th International School and Symposium on Synchrotron Radiation in Natural Science ISSRNS 2008
15 – 20. Juni 2008, Ameliówka, Polen.
       T. V. Basyuk, L. O. Vasylechko, I. I. Syvorotka, D. Trots, R. Niewa
„Phase and Structural Bhaviour of the PrAlO3-LaAlO3 Pseudo-Binary System”
 
17th Biennial University Government Industry Micro/nano Symposium UGIM 2008
13. – 16. Juli 2008, University of Louisville, Kentucky, USA.
       L. V. Shlyk, S. A. Kryukov, L. E. De Long, B. Schüpp-Niewa, R. Niewa, J. W. Lynn, Qing Huang, E. Arenholz,
       C. Piamonteze
„A Novel Class of High-TC Ferromagnetic Semiconductors”
 
16th International Conference on Solid Compounds of Transition Elements SCTE2008
26. – 31. Juli 2008, Dresden, Deutschland.
       R. Niewa, D. Rau, A. Wosylus, K. Meier, M. Hanfland, U. Schwarz
„High-pT Crystal Growth and EoS of ε-Fe3N1+x
       A. Schlechte, M. Schmidt, R. Niewa, H. Borrmann, G. Auffermann, M. Bednarski, Ł. Bochenek, T. Cichorek,
       F. Steglich, R. Kniep
„HfAs1.7Se0.2 – A Non-magnetic Kondo System”
 
Deutsche Neutronenstreutagung 2008
15. – 17. September 2008, Garching bei München, Deutschland.
       F. Gäbler, A. Senyshyn, R. Niewa
„Magnetic Structure of (Ce3N)In”
 
16th International Conference on Ternary and Multinary Compounds ICTMC-16
15. – 19. September 2008, TU Berlin, Deutschland
       T. Basyuk, L. Vasylechko, I. Syvorotka, U. Schmidt, D. Trots, R. Niewa
„Crystal structures, thermal expansion and phase transitions of mixed Pr1–xLaxAlO3 perovskites”
 
14. Vortragstagung der Wöhler-Vereinigung für Anorganische Chemie6. – 10. Oktober 2008, Garching bei München, Deutschland.
       D. Rau, U. Schwarz, A. Wosylus, K. Meier, M. Hanfland, R. Niewa
„Zustandsgleichung und Hochdruck-Hochtemperatur-Einkristallzucht von ε­-Fe3N1+x
       F. Gäbler, W. Schnelle, A. Senyshyn, R. Niewa
„Magnetische Struktur von (Ce3N)In”
       D. Bräunling, F. R. Wagner, R. Niewa
„Ungewöhnliche Oxidationsstufen in Nitridometallaten ― Ce2[CrN3]: Präparation, Struktur und Eigenschaften ”
 
17. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)7. – 12. März 2009, Universität Hannover, Deutschland.
       D. Bräunling, A. Senyshyn, R. Niewa
„Kristallstruktur der Li-reichen Nitrid-Chalkogenide Li8EN2 (E = Se, Te)”
       D. Rau, U. Schwarz, A. Wosylus, M. Wessel, R. Dronskowski, M. Hanfland, R. Niewa
„ζ-Fe2N: Hochdruck-Hochtemperatur-Verhalten und Phasenumwandlung zu ε-Fe3N1,5
 
International Workshop on Advanced Nanostructured Surfaces for Industrial Applications, II – Nanoproduction & Applications
04. – 07. April 2009, University of Cambridge, GB.
       S. Veprek, R. Niewa, K. Köhler
„Superhard Nanocomposites”
 
APS March Meeting 2009, Conference of the American Physical Society
17. – 20. März 2008, Pittsburgh, Pennsylvania, USA.
       L. Shlyk, R. Niewa, B. Schüpp-Niewa, L. E. De Long
„Structure and Magnetotransport Properties of High-TC Ferromagnetic Semiconductors, (Ba,Sr)M2±xRu4±xO11 with M = Mn, Fe, Co”
 
Oxide Materials for Electronic Engineering – fabrication, properties and application ОМЕE-2009
22. – 26. Juni 2009, Lviv Polytechnic National University, Lviv, Ukraine.
       T. Basyuk, L. Vasylechko, S. Fadeev, V. Berezovets, D. Trots, R. Niewa
„Interaction of components in the PrAlO3- and LaAlO3-based systems”
 
The International Conference on Magnetism ICM 2009
26. – 31. Juli 2009, Universität und Forschungszentrum Karlsruhe, Deutschland.
       T. Cichorek, Ł. Bochenek, R. Niewa, M. Schmidt, A. Schlechte, R. Kniep, F. Steglich
„Electron scattering off structural two-level systems in ZrAs1.595(3)Se0.393(1)
 
25th European Crystallographic Meeting ECM25
16. – 21. August 2009, Military Museum & Cultural Center, Istanbul, Türkei.
       T. Basyuk, L. Vasylechko, S. Fedeev, V. Berezovets, D. Trots, R. Niewa
In situ X-ray powder diffraction study of R1-xNdxAlO3 (R = La, Pr)”
       L. Vasylechko, T. Basyuk, A. Senyshyn, D. Trots, R. Niewa, S. Hoffmann
„Temperature- and concentration-induced structural transitions in Pr1–xRxAlO3
 
XXI Conference on Applied Crystallography XXI CAC
20. – 24. September 2009, University of Silesia, Zakopane, Polen.
       T. Basyuk, L. Vasylechko, S. Fadeev, V. Berezovets, D. Trots, R. Niewa
Crystal structures, thermal expansion and phase transitions of Sm-substituted LaAlO3 and PrAlO3
 
Zweites FRM II User Meeting
25. Mai 2009, FRM II, Garching, Deutschland.
       S. Söllradl, L. Canella, P. Kudejova, A. Türler, R. Niewa
„Synthesis and characterization of nitrogen doped ZnO particles by prompt gamma activation analysis (PGAA)”
 
ECSSCXII, 12th European Conference on Solid State Chemistry
20. – 23. September 2009, Westfälische Wilhelms-Universität Münster, Deutschland.
       D. Bräunling, A. Senyshyn, D. Trots, F. Haarmann, O. Pecher, R. Niewa
„Crystal Structure and Dynamic of Lithium-rich Nitride-Chalcogenides Li8EN2 (E = Se, Te)”
       D. Rau, A. Wosylus, U. Schwarz, A. Leineweber, T. Woehrle, D. A. Dzivenko, R. Riedel, R. Niewa
„Microstructure and Hardness of Iron Nitride Single Crystals from High-Pressure–High-Temperature Synthesis”
 
SPRSSM-10, 3rd International Symposium on Structure-Property Relationships in Solid State Chemistry
27. Juni – 2. Juli 2010, MPI-FKF Stuttgart, Deutschland.
       D. Rau, R. Niewa, K. Meier, U. Schwarz, D. Dzivenko, R. Riedel, M. Hanfland
„EoS and Pressure-induced Phase Transition γ'‑Fe4N and Hardness of the Product ε‑Fe3N0.77(1)
 
IMA2010, The 20th General Meeting of the International Mineralogical Accociation
21. – 27. August 2010, Budapest, Ungarn.
       S. Söllradl, L. Canella, P. Kudejova, A. Türler, R. Niewa
„Combustion Synthesis of ZnO Powders and Nitrogen Analysis with Prompt Gamma Activation Analysis”
 
EPDIC-12, 12th European Powder Diffraction Conference
27. – 30. August 2010, Darmstadt, Deutschland.
       T. Basyuk, V. Berezovets, D. Trots, S. Hoffmann, R. Niewa, L. Vasylechko
„Phase diagram of the PrAlO3-GdAlO3 system”
 
EMC26, 26th European Crystallographic Meeting
29. August – 2. September 2010, Darmstadt, Deutschland.
       T. Basyuk, S. Fedeev, V. Berezovets, D. Trots, S. Hoffmann, R. Niewa, L. Vasylechko
„Crystal structure behaviour prediction in the RAlO3R’AlO3 system”
 
ICEAA'10, International Conference on Electromagnetics in Advanced Applications
20. – 24. September 2010, Sydney, Australien.
       L. E. De Long, L. Shlyk, G. Cao, R. Niewa
„The Promise of Strong Spin-Orbit Coupling: Novel Materials with Novel Properties for Novel Devices”

Trilateral russisch-deutsch-französisches Seminar Advances in Inorganic Crystal Chemistry: Non-Conventional Approaches, New Techniques, Structure Modelling and Prediction
24. – 25. Juni 2011, St. Petersburg, Russland.
       R. Niewa
„New and Old Iron Nitrides via High-Pressure–High-Temperature Synthesis”

PM ’11, The European Conference on Physics of Magnetism 2011
27. Juni – 01. Juli 2011, Adam Mickiewicz University, Poznan, Poland.
       Ł. Bochenek, T. Cichorek, A. Czulucki, M. Schmidt, G. Auffermann, Y. Prots, R. Niewa, R. Kniep, F. Steglich
„Two-Channel Kondo Problem in ZrAs1.58Se0.39
 
Gemeinsame Konferenz der Deutschen Gesellschaft für Kristallographie (DGK),
der Deutschen Mineralogischen Gesellschaft (DMG) und der Östereichischen Mineralogischen Gesellschaft (ÖMG): Crystals, Minerals and Materials
20. – 24. September 2011, Universität Salzburg, Östereich.
       M. Bischoff, R. Niewa
„Crystal Structure and Thermochemical Classification of Ba2In”
       A. Senyshyn, H. Boysen, R. Niewa, Ya. Burak, V. Adamiv, I. Chumak, H. Fuess
  „Crystal structure of Li2B4O7
 
ECSSCXIII, 13th European Conference on Solid State Chemistry
25. – 28. September 2011, Lunds Universitet, Schweden.
       S. Zhang, R. Niewa
„Possible Intermediates during Ammonothermal Synthesis of GaN”
 
Symposium für Festkörperchemie
11. Januar 2012, Universität Ulm, Deutschland.
      R. Niewa
„Lithium-reiche Nitride: Materialien mit Potential für neue Batterie-Generationen?”
(eingeladener Vortrag)
 
Smart Surfaces 2012, Solar & BioSensor Applications
06. – 09. März 2012, Alexander Hotel, Dublin, Irland.
       Y. G. Baum, L. M. Magno, S. Link, M. Bischoff, C. Schlick, S. Ludwigs,R. Niewa, C. Stubenrauch
Microemulsions as Reaction Media for the Synthesis of Bimetallic Nanoparticles: Size and Composition of Particles
 
Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
12. – 15. März 2012, LMU München, Deutschland.
       S. Zhang, R. Niewa
„Synthesis and Crystal Structures of Novel Gallium Amides and Amines”
 
Superconductivity in iron based compounds
21. – 23. März 2012, München, Deutschland.
       M. Bischoff, L. Shlyk, R. Niewa
„Sb-Doped LiFeAs Crystals: Synthesis and Physical Properties”
 
ICSM 2012, International Conference on Superconductivity and Magnetism
29. April – 04. Mai 2012, Artemis Marin Princess Hotel, Kumburgaz-Istanbul, Türkei.
       L. Shlyk, M. Bischoff, E. Rose, R. Niewa
„Evolution of superconducting properties of LiFeAs single crystals doped with magnetic or nonmagnetic impurities”
 
QCNP 2012, Quantum Criticaity and Novel Phases
26. – 29. August 2012, MPI für Chemische Physik fester Stoffe, Dresden, Deutschland.
       T. Cichorek, Ł. Bochenek, A. Czulucki, M. Schmidt, G. Auffermann, R. Niewa, F. Steglich, R. Kniep
„Two-channel Kondo effect in ZrAs1.58Se0.39 derived from non-magnetic quantum impurities”
 
GDCh-Tagung Materialchemie für Energie- und Ressourcennutzung
17. – 19. September 2012, TU Darmstadt, Deutschland.
       M. Widenmeyer, R. Niewa
In situ neutron diffraction in the system Fe–N”
       M. Widenmeyer, R. Niewa
In situ neutron diffraction in the system V–N”
       M. Bischoff, L. Shlyk, E. Rose, S. Zapf, M. Dressel, R. Niewa,
„Sb doped LiFeAs Single Crystals: Crystal Structure and Physical Properties”
 
Deutsche Neutronenstreutagung 2012
24. – 26. September 2012, Gustav-Stresemann-Institut, Bonn, Deutschland.
       M. Widenmeyer, R. Niewa
In situ diffraction in the systems V–N and Fe–N”
 
6. Aachen-Dresden International Textile Conference
29. – 30. November 2012, Maritim Hotel – Internationales Congress Center Dresden, Deutschland.
       S. Zinn, M. Bischoff, R. Niewa, B. Clauß, M. R. Buchmeiser
„Synthesis and characterization of high performance yttrium aluminum garnet fibers”
 
Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
19. – 22. März 2013, TU Bergakademie Freiberg, Deutschland.
       M. Bischoff, L. Shlyk, R. Niewa
„Zr2Fe12As7: A New Iron Arsenide with Structural Relations to LiFeAs”
       R. Niewa, S. Zhang, T. Richter
„Chemistry of Ammonothermal Nitride Growth”
       S. Zhang, R. Niewa
„Intermediates during Ammono-basic Crystal Growth of GaN”
       T. Richter, S. Zhang, R. Niewa
„Ammonothermal Synthesis of a New Modification of K2[Zn(NH2)4]”
 
ECSSC’14, 14th European Conference on Solid State Chemistry
07. – 10. Juli 2013, Espace Agora, Bordeaux, Frankreich.
       K. K. Wolff, L. Shlyk, M. Bischoff, R. Niewa, Th. Schleid
„Hole-doped Ca1–xNaxFFeAs: An Iron-Arsenide Based Superconductor?”
 
11th  European Conference on Applied Superconductivity Eucas 2013
15. – 19. Spetember 2013, Genova, Italien.
       Shlyk, K. Wolff, M. Bischoff, E. Rose, T. Schleid, R. Niewa
„Anisotropy of superconducting properties and magnetic relaxation of Na-doped CaFeAsF single crystals”
 
8th International Workshop on Bulk Nitride Semiconductors IWBNS-VIII
30. September – 5. Oktober 2013, Kloster Seeon, Deutschland.
       S. Zhang, R. Niewa
„Intermediates during Ammonothermal Crystal Growth of GaN” (eingeladener Vortrag)
 
7th International Symposium on Tin Whiskers
12. – 13. November 2013, Costa Mesa, Californien, USA.
       P. Eckold, W. Hügel, R. Niewa
„Corrosion Induced Whisker Growth – Influence of Tin Plating”
 
Minisymposium Oxidische Materialien
25. – 26. Februar 2014, Universität Mainz, Deutschland.
       R. Niewa
„Neue Ruthenate als Materialien: Chemie, Physik und potentielle Anwendung”
(eingeladener Vortrag)
 
22. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
13.– 20. März 2014, Henry-Ford-Bau, Berlin, Deutschland.
       J. Hertrampf, S. Zhang, N. S. A. Alt, E. Schlücker, R. Niewa
„Alkaline-Earth Metal Amides as Mineralizer in Ammonothermal GaN Crystal Growth: Ba[Ga(NH2)4]2 as Intermediate”
       K. K. Wolff, L. Shlyk, M. Bischoff, E. Rose, R. Niewa, Th. Schleid
„Hole-doped Ca1–xNaxFFeAs: A New Iron-Arsenide Based Superconductor”
 
EMRS-Spring Meeting, European Materials Research Society
26. – 30. Mai 2014, Lille, Frankreich.
       S. Zhang, T. M. M. Richter, J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
„Chemistry of ammonothermal nitride crystal growth”(eingeladener Vortrag)
 
CIMTEC2014, 6th Forum on New Materials
15. – 20. Juni 2014, Montecatini Terme, Tuscany, Italien.
       L. Shlyk, M. Bischoff, E. Rose, R. Niewa
„Superconductivity at Tc = 36.5 K in Na-substituted SrFe2As2 single crystals”
 
Moscow International Symposium on Magnetism MISM-2014
28. Juni – 3. Juli 2014, Lomonosov Moscow State University, Russland.
       A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, S. Nemrava, M. Bischoff,
       R. Niewa, A. S. Semisalova, I. V. Krivtsov, L. I. Isaenko, G. G. Mikhailov
„Growth and Characterization of Al-Substituted Barium Hexaferrite Single Crystals”
 
ISE2014, 65th Annual Meeting of the International Society of Electrochemistry
31. August – 5. September 2014, École Polytechnique Fédérale de Lausanne, Schweiz.
       L. Wang, M. Widenmeyer, A. S. Gago, P. Gazdzicki, N. Wagner, R. Niewa, K. A. Friedrich
„Oxynitride catalysts for ORR in acidic and alkaline medium”
 
GDCh-Tagung Innovative Materialsynthesen
15. – 17. September 2014, TU Dresden, Deutschland.
       T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa
„Ammonothermal Synthesis of Li4[Zn(NH2)4](NH2)2 and Cs2[Zn(NH2)4]”
       M. Widenmeyer, R. Niewa
In situ studies in the system Mn–N”
       D. Weber, M. Widenmeyer, T. C. Hansen, R. Niewa, H. Kohlmann, M. Lerch
„An in-situ neutron powder diffraction study of the formation of bixbyite-type V2O3
 
SNI 2014, Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten
21. – 23. September 2014, World Conference Center Bonn, Deutschland.
       S. Söllradl, M. Greiwe, V. J. Bukas, M. R. Buchner, M. Widenmeyer, T. Kandemir, A. Senyshyn, P. Kudejova,
       T. Nilges, A. Türler, R. Niewa
„Urea based solution combustion synthesis and prompt gamma activation analysis of orange colored, essentially nitrogen-free ZnO powders”
 
Electrochemistry 2014
22. – 24. September 2014, Johannes Gutenberg-Universität Mainz, Deutschland.
       P. Eckold, R. Niewa, M. Rolff, W. Hügel
„Texture depending corrosion behavior and Raman spectroscopic investigations on electrodeposited tin layers”
 
BICMM-14 Magnetic materials. New technologies
19. – 23. August 2014, Irkutsk State University, Irkutsk, Russland.
       A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, S. Nemrava, R. Niewa, A. S. Semisalova, I. V. Krivtsov,
       L. I. Isaenko, G. G. Mikhailov
„Ti-Substituted BaFe12O19 Single Crystal Growth and Characterization”
 
APS American Physical Society, March Meeting
2. – 6. März 2015, Henry B. Gonzalez Convention Center, San Antonio, Texas, USA.
       S. Kirchner, T. Cichorek, L. Bochenek, M. Schmidt, R. Niewa, A. Czulucki, G. Auffermann, F. Steglich, R. Kniep
„Two-channel Kondo physics from arsenic bond oscillations in zirconium arsenideselenide”
 
DKT 2015 15. Kristallzüchtungstagung
4. – 6. März 2015, Goethe-Universität Frankfurt am Main, Deutschland.
       A.Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa,
       E. Schlücker, P. J. Wellmann
„In Situ X-Ray Imaging of GaN under Ammonothermal Conditions – Application for GaN Solubility Measurements”
 
  1. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
    14. – 19. März 2015, Georg-August Universität Göttingen, Deutschland.
           M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa
    „Trigonal bipyramidal coordination of Zn2+ in Zn(NH3)2F2 and Zn(NH3)3F2
           P. Eckold, W. Hügel, R. Niewa
    „Two Modifications of Tin(II) Bromide”
           Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
    „SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis”
           S. Nemrava, D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, N. S. Perov, A. S. Semisalova, I. V. Krivtsov,
           L. I. Isaenko, G. G. Mikhailov, R. Niewa
    „Ti-Substituted BaFe12O19 Single Crystal Growth and Characterization”
           S. Nemrava, D. A. Vinnik, D. A. Zherebtsov, L. S. Mashkovtseva, M. Bischoff, N. S. Perov, A. S. Semisalova,
           I. V. Krivtsov, L. I. Isaenko, G. G. Mikhailov, R. Niewa
    „Growth, Structural and Magnetic Characterization of Al-Substituted barium hexaferrite Single Crystals”
           D. Stoiber, R. Niewa
    „Structural Distortion in the Compounds (A3N)As (A = Mg, Ca, Sr, Ba)”
           W. Ney, R. Niewa
    „Composition dependent transitions from cubic to tetragonal in Li7+xTexI1—xN2
ECSSC 15, 15th European Conference on Solid State Chemistry
23. – 26. August 2015, Universität Wien, Östereich.
       J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
„Three Modifications of Barium Tetramidogallate: An Intermediate in Ammonothermal GaN Crystal Growth”
       D. Stoiber, R. Niewa
„Alkaline-earth Metal Dependent Structural Distortion in Inverse Perovskite Nitride Arsenides”
 
ICIE-2015, International Conference of Industrial Engineering,
22. – 23. Oktober 2015, South Ural State University, Chelyabinsk, Russland.
       D. A. Vinnik, S. A. Gudkova, R. Niewa R.
„Growth of lead and aluminum substituted barium hexaferrite single crystals from lead oxide flux”
 
IWBNS-IX, 9th International Workshop on Bulk Nitride Semiconductors
2. – 6. November 2015, Oak Valley, Wonju, Südkorea.
       M. M. Richter, J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
„Ammonothermal Nitride-Semiconductor Crystal Growth from a Chemist’s Perspective” (eingeladener Vortrag, Scene-setter talk)
24. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
15. – 17. März 2016, Universität Stuttgart, Deutschland.
       S. Nemrava, L. Link, B. Blaschkowski, R. Niewa
„Crystal Growth and Characterization of BaMRu5O11 (M = Li, Cu)”
       S. Nemrava, D. A. Vinnik, R. Niewa
„Crystal Growth and Characterization of Mn-Substituted Hexaferrites BaFe12–xMnxO19
       J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
„Ammonothermal Synthesis and Crystal Growth of Indium Nitride”
       T. Lehmann, R. Niewa
„Electrochemical formation of metal nitride surface layers in molten salt systems”
       D. Stoiber, P. Höhn, R. Niewa
„Nitrogen Ordering in Inverse Perovskite Nitrides”
       M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa
„Subsequent condensation in [Zn2(NH3)2(NH2)3]Cl and [Zn(NH3)2(NH2)]Br: towards ammonothermal crystal growth of Zn3N2
 
APS March Meeting 2016, Conference of the American Physical Society
14. – 18. März 2016, Baltimore, Maryland, USA.
       E. De Long, L. Shlyk, R. Niewa
„Structure and Physical Properties of SrNiRu5O11 Single Crystals: A New Frustrated R-type Ferrite Based on Ordered Kagome Nets”
 
GCCCG-1/DKT 2016, Deutsche Kristallzüchtungstagung
16. – 18. März 2016, Dresden, Deutschland.
       R. Niewa, J. Hertrampf, T. M. M. Richter, N. S. A. Alt, E. Schlücker
„Chemistry of Ammonothermal Semiconductor Crystal Growth” (eingeladener Vortrag)
 
ICIE-2016, International Conference of Industrial Engineering
17. – 20. Mai 2016, South Ural State University, Chelyabinsk, Russland.
       D. A. Vinnik, S. A. Gudkova, R. Niewa
„Barium hexaferrite single crystal growth using PbO and Na2O based flux”
 
1st ammonothermal Wolfgang-Hillen-Summerschool
16. – 23. Juli 2016, Friedrich-Alexander-Universität Erlangen
       R. Niewa
„Chemistry in prototropic solvent ammonia”
 
MH2016, 15th International Symposium on Metal-Hydrogen Systems
7. – 12. August 2016, Interlaken, Schweiz.
       H. Cao, C. Pistidda, T. M.M. Richter, R. Niewa, P. Chen, T. Klassen, M. Dornheim
„Ternary Transition Metals Amides for Hydrogen Storage: Cases Study with Alkali Metal Amidozincates”           
 
IWN 2016, International Workshop on Nitride Semiconductors
2. – 7. Oktober 2016, Orlando, Florida, USA.
       J. Hertrampf, P. Becker, N. S. A. Alt, E. Schlücker, R. Niewa
„Ammonothermal Synthesis and Crystal Growth of Indium Nitride” 
       R. Niewa, J. Hertrampf, T. M. M. Richter, N. S. A. Alt, E. Schlücker
„Chemistry of the Ammonothermal Method for Growth of Nitrides as GaN, InN and Zn3N2”(eingeladener Vortrag)
 
MIPT59, 59th MIPT Scientific Conference
21. – 26. Oktober 2016, Moscow institute of physics and technology, Dolgoprudny, Russia.
       A. Gudkova, D. A. Vinnik, S. Nemrava, Z. Hu, D. A. Zherebtsov, R. Niewa
„Oxidation states of Mn in BaFe12–xMnxO19
 
MMM 2016, 61th Annual Conference on Magnetism and Magnetic Materials
31. Oktober – 4. November 2016, New Orleans, Louisiana, USA.
       L. Shlyk, L. E. De Long, R. Niewa
„Structure and Physical Properties of SrNiRu5O11 Single Crystals: A New R-Type Ferrite Based on Ordered Kagome Nets”
 
25. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)26. – 30. März 2017, Karlsruhe Institute of Technology, Deutschland.
       P. Clark, S. Steinberg, R. Dronskowski, C. McCammon, I. Kupenko, M. Bykov, L. Dubrovinsky, L. G. Akselrud,
       U. Schwarz, R. Niewa
„Novel High-pressure Polymorph of NiAs-Type FeN”
 
PM’17, The European Conference Physics of Magnetism 2017
26. – 30. Juni 2017, Poznań, Polen.
       T. Cichorek, L. Bochenek, M. Schmidt, R. Niewa, A. Czulucki,G.Auffermann, F. Steglich, R. Kniep, S. Kirchner
„Two-channel Kondo physics due to As vacancies”
 
International Conference on Strongly Corrolated Electron Systems (SCES 2017)
17. – 21. Juli 2017, Prag, Tschechien.
       T. Cichorek, L. Bochenek, M. Schmidt, R. Niewa, A. Czulucki,G.Auffermann, F. Steglich, R. Kniep, S. Kirchner
„Two-channel Kondo physics due to As vacancies”
 
ECSSC’16, 16th European Conference on Solid State Chemistry
23. – 26. Juli 2017, University of Strathclyde, Glasgow, Great Britain.
       R. Niewa, W. P. Clark, S. Steinberg, R. Dronskowski, C. McCammon, I. Kupenko, M. Bykov, L. Dubrovinsky,
       L. G. Akselrud, U. Schwarz
„Novel High-pressure Polymorph of NiAs-Type FeN”
 
MMM 2017, 62th Annual Conference on Magnetism and Magnetic Materials
6. – 10. November 2017, The David L. Lawrence Convention Center, Pittsburgh, Pennsylvania, USA.
       L. Shlyk, L. E. DeLong, S. Strobel, R. Niewa
„Coexistence of ferromagnetism and spin glass freezing in the site-disordered kagome ferrite SrSn2Fe4O11
 
Jahrestreffen der ProcessNet-Fachgruppe Hochdruckverfahrenstechnik
20. – 21. Februar 2018, FAU Erlangen-Nürnberg.
       R. Niewa, J. Hertrampf, P. Becker, E. Schlücker
„Chemistry of Ammonothermal Semiconductor Nitride Crystal Growth”
 
26. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
7. – 8. März 2018, Universität Duisburg-Essen, Essen, Deutschland.
       P. Clark, K. Guo, D. Rau, U. Burkhardt, W. Schnelle, R. Castillo, L. Akselrud, R. Niewa, U. Schwarz
„High-pressure–high-temperature synthesis, hardness and magnetic properties of the metastable ferromagnet ε-Fe2MnN”
 
19. GdCH-Vortragstagung für Anorganische Chemie der Fachgruppen Wöhler-Vereinigung und Festkörperchemie und Materialforschung
24. – 2 September 2018, Universität Regensburg, Deutschland.   
       W. P. Clark, R. Niewa
„Crystal structure and synthesis of SrLi2{Li[CoN2]}: a novel quaternary nitridocobaltate(I) with evidence of Li and Co ordering”
       M.Häßner, D. A. Vinnik, R. Niewa
„Crystal structure of the ferrite (Ba,Pb)Fe7.1(3)Ti1.9(3)O15: a missing link”
       C. Bäucker, R. Niewa
„A new modification of Rb[Al(NH2)4]: synthesis and crystal structure”
       T. Lehmann, R. Niewa
„Electrochemical formation of Co3InN in salt melt”
       P. Becker, D. Gudat, R. Niewa
„Dissolved species in ammonoacidic GaN crystal growth”
       S. Kunkel, R. Niewa
„Ammonothermal Synthesis of Na4[Zn(X)4](X)2, (X = NH2, OH)”
       D. Stoiber, R. Niewa
„PolyDis: Simple Quantification Tool for Distortion of Polyhedra in Crystalline Solids”
 
27. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK)
25. – 28. März 2019, Universität Leipzig, Deutschland.
       L. Link, Y. Lin, R. Niewa

„Two New Nitridogermanates: Sr4[GeN4] and Sr12Ge2[GeN3]2[GeN4]2

XXIX. Tage der Seltenen Erden  ̶  Terrae Rarae 2019
30. Mai – 01. Juni 2019, Viking Line M/S Mariella.
       S. Kunkel, R. Niewa
„Synthesis of Na3[R(NH2)6], Intermediates during the Ammonothermal Synthesis of Rare-Earth Metal Nitrides”

16th Akasaki Research Center Symposium, To the New Horizon of the Nitride Research
29. November 2019, Nagoya University Akaski Research Center, Japan.
      S. Schimmel, T. Steigerwald, M. Koch, P. Macher, P. Duchstein,
      A.-C. L. Kimmel, N. S. A. Alt, D. Zahn, R. Niewa, E. Schlücker, P. Wellmann
In situ x-ray monitoring of ammonothermal reaction processes for advancing the understanding of ammonothermal GaN growth”

Forschungsberichte

Institutsentwicklung und Wissenschaftlicher Bericht des MPI CPfS, Selected research reports, Dresden, 2000
       J. Klatyk, R. Niewa, F. R. Wagner, W. Schnelle, Z.-L. Huang, H. Borrmann, R. Kniep
„Low-valency nitridometalates”
       O. Sichevich, R. Ramlau, R. Giedigkeit, M. Schmidt, R. Niewa, W. Schnelle, Y. Grin
„On the europium digallides”
 
Hasylab/Desy Jahresbericht 2001
       R. Niewa, Z. Hu, C. Grazioli, U. Rößler, M. S. Golden, M. Knupfer, J. Fink, F. M. F. de Groot
„XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, Mn-L2,3 and N-K thresholds”
       R. Niewa, M. Schmidt, R. Giedigkeit, Z. Hu, U. Schwarz, W. Schnelle, R. Cardoso, M. Hanfland,
       K. Klementiev, Yu. Grin
„Pressure-induced oxidation state change of ytterbium in YbGa2
 
HMI/BENSC Experimental Report 2001, Structure – Chemical Structure
       G. Auffermann, R. Kniep, Yu. Prots, R. Niewa, M. Tovar
„Metal Nitrides: (Ce3N)In”
 
Jahrbuch der Max-Planck-Gesellschaft 2002, Aktuelle Forschungsschwerpunkte
       R. Niewa, W. Schnelle, F. R. Wagner, Z.-L. Huang, J. Klatyk, M. Kirchner, G. Auffermann, Yu. Prots‘, M. Kohout,
       U. Schmidt, M. Baenitz, S. Bühler-Paschen, A. Bentien, R. Kniep, P. Novák, P. Gütlich, R. Schlögel, S. F. Parker
„Metallreiche Stickstoffverbindungen: Zwischen Valenzverbindungen und metallischen Systemen”
 
Hasylab/Desy Jahresbericht 2002
       R. Niewa, Z. Hu, R. Kniep
„Mn-K-edge XAS Spectra of Manganese-Nitridocompounds”
       R. Niewa, Z. Hu, R. Kniep
„Fe-K-edge XAS Spectra of Iron-Nitridocompounds”
       L. Vasylechko, R. Niewa, A. Senyshyn, Y. Pivak, D. Savytskii, M. Knapp, C. Bähtz
„Crystal structures, thermal expansion and phase transitions of CeAlO3 and CeGaO3
 
HMI/BENSC Experimental Report 2002, Structure – Chemical Structure
       G. Auffermann, R. Kniep, Yu. Prots, R. Niewa, D. A. Zherebtsov, D. Többens
„New Nitrogen Compounds: γ-Li7[VN4]”
       G. Auffermann, R. Kniep, R. Niewa, M. Kirchner, J. Hernandez-Velasco, N. Stüßer, D. Többens
„New Nitrogen Compounds: Magnetic Order of (Ce3N0.9)In”
 
Wissenschaftlicher Bericht des MPI CPfS, Dresden, 2003
New developments:
       W. Schnelle, U. Burkhardt, R. Ramlau, R. Niewa, G. Sparn
„Preparation and Handling of Samples under Inert Gas Conditions”
       R. Niewa, U. Burkhardt, M. Schmidt, R. Giedigkeit, M. Armbrüster, V. Pacheco
„X-ray Absorption Spectroscopy (XAS)”
 
Selected research reports:
       P. Höhn, R. Niewa, Z.-L. Huang, A. Mehta, V. A. Ivanshin, J. Sichelschmidt, W. Schnelle, Z. Hu, R. Kniep
„Low-valency Nitridonickelates”
       M. Kirchner, R. Niewa,W. Schnelle, F. R. Wagner, R. Kniep
„Preparation and Properties of Ternary Rare-earth Nitrides of Indium (R3N)In”
 
Hasylab/Desy Jahresbericht 2003
       U. Burkhardt, R. Niewa, M. Schmidt, R. Gumeniuk, L. Vasylechko, Y. Grin
„Pressure dependence of Yb valence state of some ternary Ytterbium–Transition Metal–Gallides”
       L.Vasylechko, S. Fadeyev, R. Niewa, W. Schnelle, M. Knapp, U. Bismayer
„Phase diagrams of the CeAlO3REAlO3 (RE = La, Nd) systems”
       L. Vasylechko, S. Fadyeev, D. Trots, R. Niewa, W. Schnelle, M. Knapp
„Crystal structure, phase transitions and thermal expansion of Ce0.5RE0.5AlO3 (RE = La, Nd)”
       L. Vasylechko, Ye. Pivak, A. Senyshyn, D. Savytskii, M. Berkowski, R. Niewa, M. Knapp, C. Bähtz
„Crystal structure, phase transitions and thermal expansion of La1xSrxGaO3–y (x = 0.04, 0.12) single crystals”
 
HMI/BENSC Experimental Report 2003, Structure – Chemical Structure
       G. Auffermann, R. Kniep, R. Niewa, D. A. Zherebtsov, Yu. Prots, D. Többens
„New Nitrides and Nitridometalates: Li3[ScN2]”
       G. Auffermann, R. Kniep, R. Niewa, M. Kirchner, J. Hernandez-Velasco, N. Stüßer
„New Nitrogen Compounds: Metamagnetism of (Ce3N0.9)In”
 
Hasylab/Desy Jahresbericht 2004
       U. Burkhardt, M. Schmidt, R. Niewa, W. Schnelle, A. Fedorchuk, Yu. Grin
„On the Yb valence state of YbGaGe”
       L. Vasylechko, R. Niewa, A. Senyshyn, D. Trots, U. Bismayer, M. Knapp, C. Bähtz, S. Fadyeev
„Phase diagram of the CeAlO3 – PrAlO3 system”
 
Jahrbuch der Max-Planck-Gesellschaft 2005, Aktuelle Forschungsschwerpunkte
       R. Niewa, M. Schmidt, T. Cichorek, G. Auffermann, R. Ramlau, Yu. Prots, U. Schmidt, A. Völzke, K. Schulze,
       U. Burckhardt, H. Borrmann, R. Cardoso, W. Schnelle, A. Schlechte, F. Steglich, R. Kniep
„ZrAs1,4Se0,5 – Ein neues nicht-magnetisches Kondo-System mit den Eigenschaften eines einfachen Metalls”
 
HMI/BENSC Experimental Report 2005, Structure – Chemical Structure
       G. Auffermann, R. Kniep, P. Höhn, R. Niewa, D. Argyriou
„New Nitrogen and Hydrogen Metal Compounds: Ca7N4[Inx], (Ca19N7)[In4]2, and (Ba3Nx)Sn, x = 0.64(1)”
 
Hasylab/Desy Jahresbericht 2006
       L. Vasylechko, Yu. Prots, R. Niewa, D. Trots, Yu. Grin
In situ observation of formation-dcomposition reaction for YbNi3Ga9
 
Wissenschaftlicher Bericht des MPI CPfS, Dresden, 2006
Selected research reports:
       T. Cichorek, R. Niewa, M. Schmidt, A. Schlechte, R. Ramlau, G. Auffermann, Y. Prots, A. Sanchez, P. Gegenwart,
       F. Weickert, S. Paschen, W. Schnelle, A. Wojakowski, Z. Henkie, F. Steglich, R. Kniep
„Orbital (Two-Channel) Kondo Effect Problem in Nonmagnetic PbFCl-Type Pnictide Chalcogenides”
       M. Kirchner, F. Gäbler, W. Schnelle, F. R. Wagner, R. Niewa
„Inverse Rare-Earth Perovskites of Main-Group Metals – Evolution of Properties and Chemical Bonding”
       F. Gäbler, M. Schmidt, H. Rosner, G. Auffermannn, R. Niewa
„Stacking Design in Inverse Perovskites: The System (Sr3–xBaxN)Bi”
       M. Kirchner, A. Schlechte, W. Schnelle, F. R. Wagner, R. Kniep, R. Niewa
„Chemical Bonding in Metal-Rich Nitrides of Indium”
       J. P. A. Makongo, C. Kudla, Y. Prots, U. Burkhardt, A. Leineweber, R. Niewa, G. Kreiner
„A Case Study of Complex Metallic Alloy Phases: Stability, Structure and Disorder Phenomena of Mg–Pd and Ag–Mg Compounds”
 
FRMII Experimental Report 2007
       R. Niewa, G. V. Vajenine
„Crystal Structure Details of Na3N”
       R. Niewa, M. Schmidt, A. Schlechte, T. Cichorek, R. Kniep
„Crystallographic Order in ZrAs1.40Se0.50
       R. Niewa, M. Schmidt, A. Schlechte, T. Cichorek, R. Kniep
„Crystallographic Order in ZrAs1.6–δSe0.4 at Low Temperatures”
 
Jahrbuch der Max-Planck-Gesellschaft 2007, Aktuelle Forschungsschwerpunkte
       J. P. A. Makongo, U. Burkhardt, Y. Prots, R. Niewa, G. Kreiner
„Komplexität in der Welt intermetallischer Phasen”
 
FRMII Experimental Report 2008
       R. Niewa, F. Gäbler
„Magnetic structure of (Ce3N)In”
       R. Niewa, M. Schmidt, A. Schlechte, T. Cichorek, R. Kniep
„Crystallographic Order in ZrAs0.70Se1.30
 
Wissenschaftlicher Bericht des MPI CPfS, Dresden, 2009
Selected research reports:
       A. Schlechte, G. Auffermann, M. Bednarski, Ł. Bochenek, M. Böhme,T. Cichorek, R. Niewa, N. Oeschler,
       M. Schmidt, F. Steglich, R. Kniep
„Crystal Chemistry and Physical Properties of the Non-Magnetic Kondo-Compound HfAs1.7Se0.2
 
ILL Experimental Report 2009
       F. Gäbler, A. Senyshyn, R. Niewa
„Magnetic structure of (Ce3N)In at 5 T”
 
Hasylab/Desy Jahresbericht 2010
       T. Basyuk, L. Vasylechko, S. Fadeev, V. Berezovets, D. Trots, R. Niewa
„Phase diagram of the PrAlO3–EuAlO3 pseudo-binary system”
 
FRMII Annual Report 2010, Scientific Highlights
       D. Bräunling, A. Senyshyn, R. Niewa
„Crystal Structure and Li Motion of Li8SeN2 and Li8TeN2
 
Wissenschaftlicher Bericht des MPI CPfS, Dresden, 2011
Selected research reports:
       T. Cichorek, Ł. Bochenek, A. Czulucki, M. Schmidt, R. Niewa, G. Auffermann, Y. Prots, R. Wawryk, M. Baenitz,
       F. Steglich, R. Kniep
„Non-magnetic quantum impurities and resultant two-channel Kondo effect in ZrAs1.58Se0.39
 
FRMII Annual Report 2011, Scientific Highlights
       S. Soellradl, M. Greiwe, V. J. Bukas, L. Canella, A. Senyshyn, P. Kudejova, Zs. Revay, T. Nilges, A. Türler, R. Niewa
„Prompt gamma activation analysis on orange coloured zinc oxide samples“
 
ILL Experimental Report 2013
       M. Widenmeyer, C. Ney, M. Bischoff, J. Hertrampf, R. Niewa
„Nitrogen content of CrN1+x
       C. Ney, M. Widenmeyer, R. Niewa
„Structure determination of solid solutions in the system Li8TeN2–Li7IN2
       R. Niewa, T. Hansen, H. Kohlmann, N. Kunkel, C. Ney, C. Reichert, P. Wenderoth, M. Widenmeyer
„Formations mechanism of (metastable) iron nitrides through in situ neutron diffraction of solid-gas-reactions” doi:10.5291/ILL-DATA.5-25-206
       R. Niewa, T. Hansen, H. Kohlmann, C. Ney, C. Reichert, P. Wenderoth, M. Widenmeyer
„Formation mechanism of (metastable) copper, nickel and vanadium nitrides through in situ neutron diffraction of solid-gas-reactions” doi:10.5291/ILL-DATA.5-25-214
       R. Niewa, M. Bischoff, T. Hansen, H. Kohlmann, C. Ney, T. M. M. Richter, D. Weber, M. Widenmeyer
„Formation mechanisms of (metastable) cobalt and manganese nitrides through in situ neutron diffraction of solid-gas-reactions” doi:10.5291/ILL-DATA.5-25-222
 
MLZ Experimental Report 2014
       M. Widenmeyer, C. Ney, M. Bischoff, J. Hertrampf, R. Niewa
„Formation mechanisms of metastable vanadium nitrides through in situ neutron diffraction”
Rainer Niewa
Prof. Dr. rer. nat.

Rainer Niewa

Professor

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