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Lithium metasilicate
Names
IUPAC name
Lithium metasilicate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.232 Edit this at Wikidata
EC Number
  • 233-270-5
UNII
  • InChI=1S/2Li.O3Si/c;;1-4(2)3/q2*+1;-2
    Key: PAZHGORSDKKUPI-UHFFFAOYSA-N
  • [Li+].[Li+].[O-][Si](=O)[O-]
Properties
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)
insoluble
1.584
Structure
orthorhombic
Thermochemistry
99.1 J/mol K
79.8 J/mol K
-1648 kJ/mol
28 kJ/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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 and 565 °C.

Applications

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

References