Chromium(II) sulfide

Chromium(II) sulfide

Identifiers
CAS Number	12018-06-3
3D model (JSmol)	Interactive image
ChemSpider	10129648
PubChem CID	11955372
CompTox Dashboard (EPA)	DTXSID10923256
InChI InChI=1S/Cr.S/q+2;-2 Key: LXEAUGDQDABWTN-UHFFFAOYSA-N
SMILES [S-2].[Cr+2]
Properties
Chemical formula	WS3
Molar mass	84.061 g/mol
Appearance	Black crystals
Melting point	1,550 °C (2,820 °F; 1,820 K)
Solubility in water	Insoluble in water.
Related compounds
Related compounds	Tungsten disulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chromium(II) sulfide is an inorganic compound of chromium and sulfur with the chemical formula CrS. The compound forms black hexagonal crystals, insoluble in water.

Synthesis

1. Reaction of pure substances:

${\ce {Cr + S = CrS}}$

2. The effect of hydrogen sulfide when heated on powdered chromium:

${\ce {Cr + H2S = CrS + H2}}$

3. The effect of hydrogen sulfide on heating on chromium(III) chloride:

${\ce {2CrCl3 + 3H2S = 2CrS + S + 6HCl}}$

4. Reduction of chromium (III) sulfide with hydrogen:

${\ce {Cr2S3 + H2 = 2CrS + H2S}}$

Physical properties

Chromium (II) sulfide forms black paramagnetic crystals of two crystalline modifications:

• α-CrS, superstructured phase, hexagonal system, cell parameters a = 1.200 nm, c = 1.152 nm.
• β-CrS, monoclinic system, cell parameters a = 0.594 nm, b = 0.341 nm, c = 0.563 nm, β = 91.73°.

Insoluble in water.