Calcium monosilicide (CaSi) is an inorganic compound, a silicide of calcium. It can be prepared by reacting elemental calcium and silicon at temperatures above 1000 °C.[3] It is a Zintl phase, where silicon has oxidation state −2 and covalence 2.

Calcium monosilicide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.430 Edit this at Wikidata
EC Number
  • 234-587-1
UN number 1405
  • InChI=1S/Ca.Si
    Key: OSMSIOKMMFKNIL-UHFFFAOYSA-N
  • [Si]=[Ca]
Properties
CaSi
Molar mass 68.164 g/mol[1]
Density 2.39 g/cm3[1]
Melting point 1,324 °C (2,415 °F; 1,597 K)[1]
Structure[2]
Orthorhombic, oS8,
Cmcm, No. 63
a = 0.4545 nm, b = 1.0728 nm, c = 0.389 nm
4
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Flammable gas with water
GHS labelling:
GHS02: Flammable
Warning
H261
P231+P232, P280, P370+P378, P402+P404, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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References

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  1. ^ a b c Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.55. ISBN 1-4398-5511-0.
  2. ^ Rieger, W; Parthé, E (1967). "Alkaline earth silicides, germanides and stannides with CrB structure type". Acta Crystallographica. 22 (6): 919. doi:10.1107/S0365110X67001793.
  3. ^ Brauer, Georg (1975) Handbuch der Präparativen Anorganischen Chemie. Stuttgart. Vol. 1. p. 933. ISBN 3-432-02328-6.