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]
| Names | |
|---|---|
| IUPAC name
Chromium(2+) silicide | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.031.472 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| 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] |
| insoluble | |
| Band gap | 0.35 eV (indirect)[2] |
| -0.5×10−6 emu/g[3] | |
| Structure[4] | |
| Hexagonal, hP9 | |
| P6222, No. 180 | |
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 | |
References
- Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.57. ISBN 9781498754293.
- 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.
- NIOSH Pocket Guide to Chemical Hazards. "#0141". National Institute for Occupational Safety and Health (NIOSH).
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