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
3D model (JSmol)
ECHA InfoCard 100.031.472
EC Number
  • 234-633-0234-633-0
  • InChI=1S/Cr.2Si
    Key: CHXGWONBPAADHP-UHFFFAOYSA-N
  • [Si-]#[Si-].[Cr+2]
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
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

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


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