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Constantin Buyer

Doctoral researcher
Institute of Inorganic Chemistry


+49 711 685 64223
+49 711 685 64241

Pfaffenwaldring 55
70569 Stuttgart
Room: 4.169


My project is the synthesis and characterization of Rare-earth metal(III) fluoride chalcogenides and Rare-earth metal(III) fluoride oxocarbonates. The aim is to synthesize new compounds, which may show luminescent properties. In addition to syntheses in metal ampoules (e.g. niobium), these are also carried out in quartz glass ampoules or hydrothermally in teflon autoclaves.

In addition to my research, I am currently the co-chair of young crystallographers (JKYC) of the German Society for Crystallography (DGK).

[6] C. Buyer, D. Enseling, T. Jüstel, Th. Schleid, "Hydrothermal synthesis, crystal structure and spectroscopic properties of pure and Eu3+-doped NaY[SO4]2 ∙ H2O and its anhydrate NaY[SO4]2", Crystals, 2021, 11(6), 575;

[5] D. D. Zimmermann, O. Janka, C. Buyer, R. Niewa, Th. Schleid, "Nd5OF5Se4 and Sm5OF5Se4: New Layered Oxide Fluoride Selenides of the Lanthanoids", Solid State Science, 2021, 116, 106601;

[4] H. Grossholz, C. Buyer, S. M. A. Lotter, S. Wolf, Th. Schleid, “About Lanthanoid Fluoride Selenide Oxoselenotantalates with the Composition Ln3F2Se2TaO4 (Ln = La – Nd)”, Z. Anorg. Allg. Chem. 2020, 646, 1588-1594;

[3] C. Buyer, H. Grossholz, Th. Schleid, "The Structural Dimorphism of Lanthanum Oxide Fluorde Selenide La2OF2Se", Crystals 2019, 9, 435,

[2] C. Buyer: "Neues aus dem Bereich der Seltenerdmetall(III)-Fluoridchalkogenide" Master thesis, University of Stuttgart (2018).

[1] C. Buyer: "Selten-Erd-Metall(III)-Fluoridsulfide als Wirtgitter für Leuchtstoffe" Bachelor thesis, University of Stuttgart (2016).



[9] C. Buyer, Th. Schleid: „Ln/O/F/Se – A combination of just four elements, but a huge diversity of compounds and crystal structures“ Poster contribution: GDCh Science Forum Chemistry 2021, Online, Germany (August 29th-September 1st 2021).

[8] C. Buyer, Th. Schleid: „Synthesis, phase characterization and crystal structure comparison of a self-made SmF2–SmFCl–SmFO mixture by XRD and EDXS“ Poster contribution: 25. Congress of the Interntional Union of Crystallography, Prague, Czech Republic (August 14th-22th 2021).

[7] C. Buyer, Th. Schleid: "Crystal-Structure Determination of Hydrothermally Produced Nanocrystalline Synthetic Bastnaesite-Type NdF[CO3]" Poster contribution: 29th Annual Meeting of the German Crystallographic Society, DESY Hamburg, Online, Germany (March 15th-18th 2021).

[6] C. Buyer, Th. Schleid: "NaY[SO4]2 ∙ H2O: A potential precursor for new phosphors" Poster contribution: Prequel Symposium on Advanced Technologies and Materials, Online, Wrocław, Poland (October 13th-15th 2020).

[5] C. Buyer, Th. Schleid: "NaY[SO4]2 ∙ H2O: A potential precursor for new phosphors" Poster contribution: Online-Vortragstagung für Anorganische Chemie der Fachgruppen Wöhler-Vereinigung und Festkörperchemie und Materialforschung, Cologne, Germany (September 29th-30th 2020).

[4] C. Buyer, Th. Schleid: "Single Crystals of Nb5Se4 with Ti5Te4-Type Structure" Poster contribution: Joint Polish-German Crystallographic Meeting 2020, Wrocław, Poland (February 24th-27th 2020).

[3] C. Buyer, Th. Schleid: "Synthesis and characterization of different rare earth metal fluoride oxocarbonates REF[CO3]" Poster contribution: 1st Joint Meeting of the "Young Crystallographers" (DGK) and the "Young Crystal Growers" (DGKK), Cologne, Germany (September 19th-20th 2019).

[2] C. Buyer, S. Wolf, Th. Schleid: "NaCe18O9F19Se9: A Sodium-Containing Compound in the Ce2OF2Se - Ce6O2F8Se3 System" Posterbeitrag: 27th Annual Meeting of the German Crystallographic Society, Leipzig, Germany (March 25th-28th 2019).

[1] C. Buyer, D. D. Zimmermann, Th. Schleid: "CsSc3S5: The First Ternary Sulfide with CsEr3Se5-Type Structure" Poster Contribution: 26th Annual Meeting of the German Crystallographic Society, Essen, Germany (March 5th-8th 2018).

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