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Lithium metasilicate

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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

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Lithium metasilicate is prepared by the reaction of lithium carbonate and silicon dioxide at temperatures between 515 and 565 °C.[1]

Applications

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The melting of lithium metasilicate is used for the calibration of thermocouples.[2]

References

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  1. ^ Tang, Tao; Zhang, Zhi; Meng, Jian-Bo; Luo, De-Li (December 2009). "Synthesis and characterization of lithium silicate powders". Fusion Engineering and Design. 84 (12): 2124–2130. Bibcode:2009FusED..84.2124T. doi:10.1016/j.fusengdes.2009.02.017.
  2. ^ Biggar, Gordon M. (June 1972). "Diopside, lithium metasilicate, and the 1968 temperature scale". Mineralogical Magazine. 38 (298): 768–770. Bibcode:1972MinM...38..768B. doi:10.1180/minmag.1972.038.298.16. S2CID 129422457.