Lithium metasilicate
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| Names | |
|---|---|
| IUPAC name
Lithium metasilicate
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| Identifiers | |
| 12687-80-8 | |
| ChemSpider | 162106396 |
| EC Number | 233-270-5 |
| Jmol 3D model | Interactive image |
| PubChem | 66243 |
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| 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 | |
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Refractive index (nD)
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1.584 |
| Structure | |
| orthorhombic | |
| Thermochemistry | |
| 99.1 J/mol K | |
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Std molar
entropy (S |
79.8 J/mol K |
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Std enthalpy of
formation (ΔfH |
-1648 kJ/mol |
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Gibbs free energy (ΔfG˚)
|
28 kJ/mol |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Lithium metasilicate is an ionic compound with the formula Li2SiO3
Preparation[edit]
Lithium metasilicate is prepared by the reaction of lithium carbonate and silicon dioxide at temperatures between 515-565°C.
Applications[edit]
The melting of lithium metasilicate is used for the calibration of thermocouples.
References[edit]
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