TERNARY CHALCOGENIDE SYSTEMS-X - THE QUASITERNARY SYSTEM AG2S-CU2S-P4S10

Abstract

{The quasiternary system Ag2S-Cu2S-P4S10**} was investigated by DTA- and X-ray measurements. No quasiternary compound was found. The phase diagram of the constituent binary Cu2S - P4S10 is given for the first time. It contains the compounds Cu7PS6, Cu3PS4 and (CuPS3)n. The previously reported Cu4P2S7 was not observed. Thermal and X-ray data of these compounds are given. The compounds Cu7PS6 Ag7PS6 and Cu3PS4 Ag3PS4 are completely miscible in the solid state.}