Lithium Metasilicate

From Handwiki
Lithium metasilicate
Names
IUPAC name
Lithium metasilicate
Identifiers
CAS Number
  • 10102-24-6 ☑Y
3D model (JSmol)
  • Interactive image
ChemSpider
  • 162106396
EC Number
  • 233-270-5
PubChem CID
  • 66243
UNII
  • 5QDO50LGBD ☑Y
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 (nD)
 1.584
Structure
Crystal structure
 orthorhombic
Thermochemistry
Heat capacity (C)
 99.1 J/mol K
Std molar
entropy (So298)
 79.8 J/mol K
Std enthalpy of
formation (ΔfH⦵298)
 -1648 kJ/mol
Gibbs free energy (ΔfG˚)
 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 and 565 °C.[1]

Applications

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

References

  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. 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. doi:10.1180/minmag.1972.038.298.16. Bibcode: 1972MinM...38..768B. 



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Categories: [Inorganic silicon compounds] [Lithium compounds]

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