Nickel sulfide

Nickel sulfide
Names
	IUPAC name Nickel(II) sulfide
	Other names nickel sulfide, nickel monosulfide, nickelous sulfide
Identifiers
CAS Number	11113-75-0 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	26134;
ECHA InfoCard	100.037.113
EC Number	234-349-7;
PubChem CID	28094;
RTECS number	QR9705000;
UNII	I6929D52YQ ;
CompTox Dashboard (EPA)	DTXSID801316876 DTXSID5036921, DTXSID801316876 ;
	SMILES [Ni]=S; [Ni+2].[S-2];
Properties
Chemical formula	NiS
Molar mass	90.7584 g mol−1
Appearance	black solid
Odor	Odorless
Density	5.87 g/cm3
Melting point	797 °C (1,467 °F; 1,070 K)
Boiling point	1,388 °C (2,530 °F; 1,661 K)
Solubility in water	insoluble
Solubility	degraded by nitric acid
Magnetic susceptibility (χ)	+190.0·10−6 cm3/mol
Structure
Crystal structure	hexagonal
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	may cause cancer by inhalation
	GHS labelling:
Pictograms
	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

Nickel sulfide is any inorganic compound with the formula Ni_xS_y. These compounds range in color from bronze (Ni₃S₂) to black (NiS₂). The nickel sulfide with simplest stoichiometry is NiS, also known as the mineral millerite. From the economic perspective, Ni₉S₈, the mineral pentlandite, is the chief source of mined nickel. Other minerals include heazlewoodite (Ni₃S₂), polydymite (Ni₃S₄), and vaesite (NiS₂). Some nickel sulfides are used commercially as catalysts.