Chromchalkogenide, IX1 Ternare Sulfide der Systeme Calcium—Chrom—Schwefel, Strontium—Chrom—Schwefel und Barium—Chrom—Schwefel / Chromium Chalcogenides, IX1 Ternary Sulfides of the Systems Calcium Chromium Sulfur, Strontium Chromium Sulfur, and Barium Chromium Sulfur

Abstract

As the first ternary calcium chromium sulfide Ca0,29Cr0,48S was synthesized by firing of stoichiometric mixtures of CaS and Cr2S3 at 950 °C. From strontium and barium only the well-known compounds SrCr2S4 and BaCr2S4 could be obtained. The best methods of preparation for these compounds are the reactions of SrCrO4 or BaCO3 and Cr2S3 resp. with H2S/H2 at 950 °C. Whisker-like single crystals of BaCr2S4 are formed by heating of crude BaCr2S4 with AICl3. X-ray and IR data of the ternary chromium sulfides are given.