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F523522

Magnesium silicide , 99.99 , 22831-39-6

Synonym(s):
Dimagnesium silicide

CAS NO.:22831-39-6

Empirical Formula: Mg2Si

Molecular Weight: 76.7

MDL number: MFCD00016202

EINECS: 245-254-5

Update time: 2022-07-08

PRODUCT Properties

Melting point: 1102 °C
Density  1,94 g/cm3
solubility  reacts with H2O
form  Powder
Specific Gravity 2.
color  Blue
Water Solubility  Insoluble in water and denser than water.
Hydrolytic Sensitivity 7: reacts slowly with moisture/water
Crystal Structure Cubic, Antifluorite Structure - Space Group Fm3m
Sensitive  Air & Moisture Sensitive
Merck  14,5688
Stability: Spontaneously flammable - mixtures with air are explosive. Reacts with water to form toxic vapours.
EPA Substance Registry System Magnesium silicide (Mg2Si) (22831-39-6)

Description and Uses

Magnesium silicide has the molecular formula of Mg2Si and the molecular weight of 76.6955 g/mol. Its density is 1.998 g/cc and its melting point is 1102°C. It is a black powder.
Mg2Si crystallizes in a cubic CaF2 (fluorspar)-type lattice with a = 4.49 ? . The centers of this lattice are analogous to that of diamond. Each Si atom forms four covalent sp3 bonds. The Mg subshells are only half-filled. There is no bonding between the two Mg atom sites. The distance between the Mg and Si atoms is 2.77 ? . Bonding in this compound is essentially covalent.

Magnesium silicide is used to produce alloys such as aluminum alloys. It is also used in food, beverages, as a flavor enhancer and as an intermediate in chemical research.

Safety

Symbol(GHS) 
GHS02
Signal word  Danger
Hazard statements  H261
Precautionary statements  P231+P232-P422
Hazard Codes  F
Risk Statements  14-14/15
Safety Statements  7/8-43
RIDADR  UN 2624 4.3/PG 2
WGK Germany  3
TSCA  Yes
HazardClass  4.3
PackingGroup  II

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