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Chemical compound From Wikipedia, the free encyclopedia
Chromium(II) sulfide is an inorganic compound of chromium and sulfur with the chemical formula CrS.[1][2][3] The compound forms black hexagonal crystals, insoluble in water.[4]
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CrS | |
Molar mass | 84.061 g/mol |
Appearance | black crystals |
Melting point | 1,550 °C (2,820 °F; 1,820 K) |
insoluble | |
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Chromium(III) sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chromium(II) sulfide may be formed by reaction of chromium metal with sulfur or hydrogen sulfide at high temperature. It may also be formed by reacting chromium(III) chloride with H2S, reducing chromium(III) sulfide with hydrogen, or by double replacement reaction of lithium sulfide with chromium(II) chloride.[5]
Chromium(II) sulfide forms black paramagnetic crystals of two crystalline modifications:[6]
Chromium(II) sulfide is a semiconductor,[7][8] and is also used as a catalyst.[9]
Chromium(II) sulfide slowly oxidizes in air:[citation needed]
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