Lithium metasilicate

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

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 (nD)

| 1.584
Structure

Crystal structure

| orthorhombic
Thermochemistry

Heat capacity (C)

| 99.1 J/mol K

Std molar
entropy (S ~~o~~ 298)

| 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. Bibcode: 2009FusED..84.2124T.
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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Lithium compounds

Inorganic|

* LiAlCl4
* LiAlH4
* LiAlO2
* LiBF4
* LiBH4
* LiBO2
* LiB3O5
* Li2B4O7
* LiBr
* Li2CO3
* Li2C2
* LiCl
* LiClO
* LiClO3
* LiClO4
* LiCoO2
* LiF
* LiH
* LiI
* LiIO3
* Li2IrO3
* Li2MoO4
* LiNH2
* Li2NH
* LiN3
* Li3N
* LiNO2
* LiNO3
* LiNbO3
* LiOH
* LiO2
* Li2O
* Li2O2
* LiPF6
* Li2PtO3
* Li2Po
* Li2RuO3
* Li2S
* Li2SO3
* Li2SO4
* Li3H(CO3)2
* Li2SiO3
* LiTaO3
* Li2TiO3

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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