Three new compounds, Ag2HgGeS4, Ag2HgSnS4, and Ag2HgSnSe4, crystallizing in the wurtzstannite type structure have been prepared by solid state reactions at 700°C and characterized by X-ray powder methods. A fourth compound of similar composition Ag2HgGeSe4, with an hitherto unknown structure crystallizes cubically with a = 10.796 A.
Quaternary tellurides Cu2MM′Te4 (M = Zn, Cd, Hg and M′ = Si, Ge, Sn) have been prepared by solid state reactions and characterized by X-ray powder methods. All 9 compounds crystallize in a stannite type structure.
Im System ZnInSSe wurde das Teilsystem ZnIn2S4ZnIn2Se4In2Se3In2S3 röntgenographisch an Präparaten, die von 800°C abgeschreckt worden waren, untersucht. Danach weisen ZnIn2S4 bzw. ZnIn2Se4 nur kleine, die Spinelldefektstruktur im In2S3‐reichen Teil des Phasendiagramms dagegen einen ausgedehnten Homogenitätsbereich auf. Neu beobachtet wurden drei Verbindungen: 1. trigonales ZnIn2S2Se2 (ahex = 3,937, chex = 31,97 Å) mit ebenfalls großem Homogenitätsbereich 2. Zn0,4In2Se3,4 und 3. In2S3−xSex für 2,1 ≤ x ≤ 2,7. Für die beiden ternären Verbindungen bleiben die Strukturen noch unbekannt.
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