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Mechanochemical Synthesis of Cu2MgSn3S8 and Ag2MgSn3S8 [article]

Eva Maria Heppke, Steffen Klenner, Oliver Janka, Rainer Pöttgen, Martin Lerch, Technische Universität Berlin, Technische Universität Berlin
2020

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Two new thiospinels of the type AI2BIICIV3SVI8 were successfully synthesized via a mechanochemical route using binary sulfides and sulfur. Cu2MgSn3S8 and Ag2MgSn3S8 are the first AI2BIICIV3SVI8 compounds with magnesium as divalent cation. The crystal structures of Cu2MgSn3S8 and Ag2MgSn3S8 were refined in the cubic space group Fd3m using X‐ray powder diffraction. According to UV/Vis measurements, a direct optical bandgap of ca. 1.65 eV was determined for both Cu2MgSn3S8 and Ag2MgSn3S8.
more » ... re‐dependent magnetic susceptibility measurements of the Cu2MgSn3S8 sample indicate diamagnetism. A 119Sn Mössbauer spectrum confirms the tetravalent state of tin, underlining the electron‐precise description.
doi:10.14279/depositonce-9744 fatcat:flzznfswgbfo7jb6a7ga26e3zu
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Eva Maria Heppke, Steffen Klenner, Oliver Janka, Rainer Pöttgen, Martin Lerch, Technische Universität Berlin, Technische Universität Berlin. "Mechanochemical Synthesis of Cu2MgSn3S8 and Ag2MgSn3S8." (2020)