Magnesium orthosilicate

Magnesium orthosilicate
Identifiers

CAS Registry Number	10034-94-3^Y
EC number	233-112-5
InChI InChI=1S/2Mg.O4Si/c;;1-5(2,3)4/q2*+2;-4
Jmol-3D images	Image
PubChem	66225
SMILES [O-][Si]([O-])([O-])[O-].[Mg+2].[Mg+2]
Properties
Chemical formula	Mg₂SiO₄
Molar mass	140.693 g/mol
Appearance	colorless crystalline solid
Density	3.21 g/cm³
Melting point	1,890 °C (3,430 °F; 2,160 K)
Solubility in water	insoluble
Structure
Crystal structure	orthorhombic
Thermochemistry
Specific heat capacity (C)	119 J/mol K
Std molar entropy (S^o₂₉₈)	95 J/mol K
Std enthalpy of formation (Δ_fH^o₂₉₈)	-2172 kJ/mol
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Magnesium orthosilicate is a chemical compound with the formula Mg₂SiO₄.^[1]^[2] It is the orthosilicate salt of magnesium. It exists as Forsterite in nature.

Production

Magnesium orthosilicate is made by the fusion of stoichiometric amounts of magnesium and silicon oxides at 1,900 °C (3,450 °F).