Chromium(II) silicide

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Chromium(II) silicide
Names
IUPAC name
Chromium(2+) silicide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.472 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 234-633-0234-633-0
PubChem CID
  • InChI=1S/Cr.2Si
    Key: CHXGWONBPAADHP-UHFFFAOYSA-N
  • [Si-]#[Si-].[Cr+2]
Properties
CrSi2
Molar mass 108.167 g/mol
Appearancewhite 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
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).

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

  1. 1 2 Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.57. ISBN   9781498754293.
  2. 1 2 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.
  3. ↑ 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.
  4. ↑ 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.
  5. 1 2 3 NIOSH Pocket Guide to Chemical Hazards. "#0141". National Institute for Occupational Safety and Health (NIOSH).


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