Chromium(II) silicide

Chromium(II) silicide
Names
	IUPAC name Chromium(2+) silicide
Identifiers
CAS Number	12018-09-6;
3D model (JSmol)	Interactive image;
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
Melting point	1,490 °C (2,710 °F; 1,760 K)
Solubility in water	insoluble
Band gap	0.35 eV (indirect)
Magnetic susceptibility (χ)	-0.5×10−6 emu/g
Structure
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
REL (Recommended)	TWA 0.5 mg/m3
IDLH (Immediate danger)	250 mg/m3
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

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]

References

^ ^a ^b Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.57. ISBN 9781498754293.
^ ^a ^b Mattheiss, L. F. (1991). "Electronic structure ofCrSi2and related refractory disilicides". Physical Review B. 43 (15): 12549–12555. Bibcode:1991PhRvB..4312549M. doi:10.1103/PhysRevB.43.12549. PMID 9997056.
^ Shinoda, Daizaburo; Asanabe, Sizuo (1966). "Magnetic Properties of Silicides of Iron Group Transition Elements". Journal of the Physical Society of Japan. 21 (3): 555. Bibcode:1966JPSJ...21..555S. doi:10.1143/JPSJ.21.555.
^ Engström, Ingvar; Lönnberg, Bertil (1988). "Thermal expansion studies of the group IV‐VII transition‐metal disilicides". Journal of Applied Physics. 63 (9): 4476–4484. Bibcode:1988JAP....63.4476E. doi:10.1063/1.340168.
^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0141". National Institute for Occupational Safety and Health (NIOSH).

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