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
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. |
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.
