Chromium(II) silicide

Chromium(II) silicide or chromium disilicide is an inorganic compound of chromium and silicon. Its chemical formula is CrSi₂. It is a p-type thermoelectric semiconductor with an indirect bandgap of 0.35 eV.^[2]

Chromium(II) silicide

Names
IUPAC name Chromium(2+) silicide
Identifiers
CAS Number	12018-09-6
3D model (JSmol)	Interactive image
ChemSpider	17340236
ECHA InfoCard	100.031.472
EC Number	234-633-0234-633-0
PubChem CID	45051936
CompTox Dashboard (EPA)	DTXSID901010279
InChI InChI=1S/Cr.2Si Key: CHXGWONBPAADHP-UHFFFAOYSA-N
SMILES [Si-]#[Si-].[Cr+2]
Properties
Chemical formula	CrSi2
Molar mass	108.167 g/mol
Appearance	white powder
Odor	odorless
Density	4.91 g/cm3[1]
Melting point	1,490 °C (2,710 °F; 1,760 K)[1]
Solubility in water	insoluble
Band gap	0.35 eV (indirect)[2]
Magnetic susceptibility (χ)	−0.5×10−6 emu/g[3]
Structure[4]
Crystal structure	Hexagonal, hP9
Space group	P6222, No. 180
Lattice constant	a = 0.44268 nm, c = 0.63751 nm
Formula units (Z)	3
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3[5]
REL (Recommended)	TWA 0.5 mg/m3[5]
IDLH (Immediate danger)	250 mg/m3[5]
Related compounds
Other cations	Molybdenum disilicide Tungsten disilicide
Related compounds	Chromium(IV) silicide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references