Cobalt sulfide

Cobalt sulfide
Identifiers
CAS Number	1317-42-6 ;
PubChem CID	14832;
RTECS number	GG332500;
UNII	INZ5E36Y1V ;
Properties
Chemical formula	CoxSy
Molar mass	90.9982 g/mol
Appearance	black solid (alpha) ; grayish-red crystals (beta)
Density	5.45 g/cm3
Melting point	1195 °C
Solubility in water	0.00038 g/100 mL (18 °C)
Solubility	slightly soluble in acid
Magnetic susceptibility (χ)	+225.0·10−6 cm3/mol
Structure
Crystal structure	octahedral (beta)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Cobalt sulfide is the name for chemical compounds with a formula Co_xS_y. 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.

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