Lithium metasilicate
| Names | |
|---|---|
| IUPAC name
Lithium metasilicate | |
| Identifiers | |
| 12687-80-8 | |
| ChemSpider | 162106396 |
| EC number | 233-270-5 |
| |
| Jmol-3D images | Image |
| PubChem | 66243 |
| |
| 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 | |
| Refractive index (nD) |
1.584 |
| Structure | |
| Crystal structure | orthorhombic |
| Thermochemistry | |
| Specific heat capacity (C) |
99.1 J/mol K |
| Std molar entropy (S |
79.8 J/mol K |
| Std enthalpy of formation (ΔfH |
-1648 kJ/mol |
| Gibbs free energy (ΔfG˚) |
28 kJ/mol |
| Except where noted otherwise, data is 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 515-565°C.
Applications
The melting of lithium metasilicate is used for the calibration of thermocouples.
References
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