Formula Cr2S3 Melting point 1,350 °C Appearance Brown to black powder | Molar mass 200.19 g/mol Density 3.77 g/cm³ | |
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Chromium(III) Sulfide is the inorganic compound with the formula Cr2S3. It is a brown-black solid. Chromium sulfides are usually nonstoichiometric compounds, with formulas ranging from CrS to Cr0.67S (corresponding to Cr2S3).
Preparation
Chromium(III) sulfide can be preparared through the reaction of a stoichiometric mixture of the elements at 1000 °C
It is a solid that is insoluble in water. According to X-ray crystallography, its is a combination of that of nickel arsenide (1:1 stoichiometry) and Cd(OH)2 (1:2 stoichiometry). Some metal-metal bonding is indicated by the short Cr-Cr distance of 2.78 Å.
References
Chromium(III) sulfide Wikipedia(Text) CC BY-SA