Lithium orthosilicate
3D model (JSmol)
ECHA InfoCard 100.033.290 Edit this at Wikidata
EC Number
  • 264-592-4
  • InChI=1S/4Li.O4Si/c;;;;1-5(2,3)4/q4*+1;-4
  • [Li+].[Li+].[Li+].[Li+].[O-][Si]([O-])([O-])[O-]
Molar mass 119.84 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Lithium orthosilicate is a compound with the chemical formula Li4SiO4. It is a white ceramic compound, which melts congruently at a temperature of 1,258 °C (2,296 °F).[1]

Lithium orthosilicate is of primary interest towards carbon dioxide capture, as this compound reacts with CO2 at elevated temperatures to form lithium carbonate, and has been implemented in limited scale in such applications.[2] Further applications of Li4SiO4 include solid electrolytes for lithium-ion batteries, specifically solid state batteries,[3] and tritium breeding materials, as a component of the breeding blanket for planned fusion energy systems such as ITER.[1]

See also


  1. ^ a b Hanaor, D. A. H.; Kolb, M. H. H.; Gan, Y.; Kamlah, M.; Knitter, R. (2014). "Solution based synthesis of mixed-phase materials in the Li2TiO3-Li4SiO4 system". Journal of Nuclear Materials. 456: 151–161. arXiv:1410.7128. Bibcode:2015JNuM..456..151H. doi:10.1016/j.jnucmat.2014.09.028. S2CID 94426898.
  2. ^ Optimization of Li4SiO4 synthesis conditions by a solid state method for maximum CO2 capture at high temperature
  3. ^ Thin Film Lithium Battery using Stable Solid Electrolyte Li4SiO4 Fabricated by PLD