Mechanochemical Synthesis of Cu2MgSn3S8 and Ag2MgSn3S8. Issue 1 (3rd January 2020)

• Record Type: Journal Article
• Authors: Heppke, Eva Maria; Klenner, Steffen; Janka, Oliver; Pöttgen, Rainer; Lerch, Martin
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 646:Issue 1(2020)
• Page Start: 5
• Page End: 9
• Publication Date: 2020-01-03
• Subjects: Mechanochemical synthesis -- Planetary ball mill -- Thiospinels -- Rietveld refinement -- Magnetic properties; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201900190
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : Two new thiospinels of the type A I 2 B II C IV 3 S VI 8 were successfully synthesized via a mechanochemical route using binary sulfides and sulfur. Cu2 MgSn3 S8 and Ag2 MgSn3 S8 are the first A I 2 B II C IV 3 S VI 8 compounds with magnesium as divalent cation. The crystal structures of Cu2 MgSn3 S8 and Ag2 MgSn3 S8 were refined in the cubic space group Fd 3 m using X‐ray powder diffraction. According to UV/Vis measurements, a direct optical bandgap of ca. 1.65 eV was determined for both Cu2 MgSn3 S8 and Ag2 MgSn3 S8 . Temperature‐dependent magnetic susceptibility measurements of the Cu2 MgSn3 S8 sample indicate diamagnetism. A 119 Sn Mössbauer spectrum confirms the tetravalent state of tin, underlining the electron‐precise description. Abstract :