Magnesium silicide

Magnesium silicide
Names
	Preferred IUPAC name Magnesium silicide
Identifiers
CAS Number	22831-39-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	81111 ;
ECHA InfoCard	100.041.125
EC Number	245-254-5;
PubChem CID	89858;
UNII	475E6FMG3K ;
UN number	2624
CompTox Dashboard (EPA)	DTXSID4066830 ;
	InChI InChI=1S/2Mg.Si Key: YTHCQFKNFVSQBC-UHFFFAOYSA-N ; InChI=1/2Mg.Si/rMg2Si/c1-3-2 Key: YTHCQFKNFVSQBC-GEBTXNJDAA;
	SMILES [Mg]=[Si]=[Mg];
Properties
Chemical formula	Mg2Si
Molar mass	76.695 g·mol−1
Appearance	Gray cubic crystals
Density	1.99 g cm−3
Melting point	1,102 °C (2,016 °F; 1,375 K)
Solubility in water	reacts
Structure
Crystal structure	Antifluorite (cubic), cF12
Space group	Fm3m, #225
Lattice constant	a = 0.6351 nm
Formula units (Z)	4
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	reacts with water to produce pyrophoric silane
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H261
Precautionary statements	P231+P232, P280, P370+P378, P402+P404, P501
Related compounds
Other cations	Calcium silicide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Magnesium silicide, Mg₂Si, is an inorganic compound consisting of magnesium and silicon. As-grown Mg₂Si usually forms black crystals; they are semiconductors with n-type conductivity and have potential applications in thermoelectric generators.