Chemistry:Magnesium orthosilicate

Magnesium orthosilicate
Identifiers
CAS Number	10034-94-3 ;
3D model (JSmol)	Interactive image;
EC Number	233-112-5;
PubChem CID	66225;
UNII	33JD0Q1Q6P ;
	InChI InChI=1S/2Mg.O4Si/c;;1-5(2,3)4/q2*+2;-4 Key: HCWCAKKEBCNQJP-UHFFFAOYSA-N;
	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
Heat capacity (C)	119 J/mol K
Std molar; entropy (So298)	95 J/mol K
Std enthalpy of; formation (ΔfH⦵298)	-2172 kJ/mol
	Except where otherwise noted, data are 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).

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Identifiers
CAS Number	10034-94-3^Y
3D model (JSmol)	Interactive image
EC Number	233-112-5
PubChem CID	66225
UNII	33JD0Q1Q6P^Y
InChI InChI=1S/2Mg.O4Si/c;;1-5(2,3)4/q2*+2;-4 Key: HCWCAKKEBCNQJP-UHFFFAOYSA-N
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
Heat capacity (C)	119 J/mol K
Std molar entropy (S^o₂₉₈)	95 J/mol K
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	-2172 kJ/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references