Cobalt sulfide
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3D model (JSmol) |
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| Properties | |
| CoxSy | |
| Molar mass | 90.9982 g/mol |
| Appearance | black solid (alpha) grayish-red crystals (beta) |
| Density | 5.45 g/cm3 |
| Melting point | 1195 °C |
| 0.00038 g/100 mL (18 °C) | |
| Solubility | slightly soluble in acid |
| +225.0·10−6 cm3/mol | |
| Structure | |
| octahedral (beta) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Cobalt sulfide is the name for chemical compounds with a formula CoxSy. Well-characterized species include minerals with the formulas CoS, CoS2, Co3S4, and Co9S8. In general, the sulfides of cobalt are black, semiconducting, insoluble in water, and nonstoichiometric.