Lithium metasilicate

Lithium metasilicate
Names
IUPAC name Lithium metasilicate
Identifiers
CAS Number	12687-80-8
ChemSpider	162106396
EC Number	233-270-5
Jmol interactive 3D	Image
PubChem	66243
InChI InChI=1S/2Li.O3Si/c;;1-4(2)3/q2*+1;-2 Key: PAZHGORSDKKUPI-UHFFFAOYSA-N
SMILES [Li+].[Li+].[O-][Si](=O)[O-]
Properties
Chemical formula	Li₂SiO₃
Molar mass	89.566 g/mol
Appearance	colorless crystals
Density	2.52 g/cm³
Melting point	1,201 °C (2,194 °F; 1,474 K)
Solubility in water	insoluble
Refractive index (n_D)	1.584
Structure
Crystal structure	orthorhombic
Thermochemistry
Specific heat capacity (C)	99.1 J/mol K
Std molar entropy (S^o₂₉₈)	79.8 J/mol K
Std enthalpy of formation (Δ_fH^o₂₉₈)	-1648 kJ/mol
Gibbs free energy (Δ_fG˚)	28 kJ/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Lithium metasilicate is an ionic compound with the formula Li₂SiO₃

Preparation

Lithium metasilicate is prepared by the reaction of lithium carbonate and silicon dioxide at temperatures between 515-565°C.

Applications

The melting of lithium metasilicate is used for the calibration of thermocouples.

References

Lithium compounds

Inorganic	LiAlCl₄ LiAlH₄ LiAlO₂ LiBF₄ LiBH₄ LiBO₂ LiB₃O₅ LiBr LiCl LiClO LiClO₃ LiClO₄ LiCoO₂ LiF LiH LiI LiIO₃ LiNH₂ Li₂NH LiN₃ LiNO₂ LiNO₃ LiNbO₃ LiOH LiO₂ LiPF₆ LiTaO₃ Li₂B₄O₇ Li₂CO₃ Li₂C₂ Li₂MoO₄ Li₂O Li₂O₂ Li₂S Li₂SO₃ Li₂SO₄ Li₂SiO₃ Li₂Po Li₂TiO₃ Li₃N

Organic	12-hydroxystearate acetate aspartate citrate diisopropylamide orotate succinate stearate organolithiums

Minerals	Amblygonite Elbaite Eucryptite Jadarite Lepidolite Lithiophilite Petalite Pezzottaite Saliotite Spodumene Sugilite Tourmaline Zabuyelite Zinnwaldite

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