Chemistry:Lithium hexafluorosilicate
| |
| Names | |
|---|---|
| IUPAC name
dilithium; hexafluorosilicon(2-)
| |
| Other names
Dilithium hexafluorosilicate
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
| EC Number |
|
PubChem CID
|
|
| |
| |
| Properties | |
| F6Li2Si | |
| Molar mass | 155.96 g·mol−1 |
| Appearance | White powder |
| Density | 2.33 g/cm3 |
| soluble | |
| Hazards | |
| GHS pictograms | 
|
| GHS Signal word | Warning |
| H302 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Lithium hexafluorosilicate is an inorganic chemical compound with the chemical formula Li
2SiF
6.[1][2]
Synthesis
Lithium hexafluorosilicate can be obtained by reacting hexafluorosilicic acid with lithium hydroxide or lithium carbonate or by reacting silicon tetrafluoride with lithium fluoride.[3]
- H
2[SiF
6] + 2LiOH → Li
2[SiF
6] + 2H
2O
- H
Physical properties
Lithium hexafluorosilicate is a white, odorless solid that is soluble in water and methanol. When heated above 250 °C, it decomposes into lithium fluoride and silicon(IV) fluoride. It has a trigonal crystal structure with the space group P 321 (space group no. 150) and three formula units per unit cell, isotypic to sodium hexafluorosilicate.[4][5]
Uses
Lithium hexafluorosilicate is used as an intermediate in the manufacture of pharmaceuticals and other chemical compounds. It is also an intermediate in the preparation of lithium chloride from lithium-containing minerals by reacting with hexafluorosilicic acid.[citation needed]
References
- ↑ "Lithium Hexafluorosilicate" (in en). American Elements. https://www.americanelements.com/lithium-hexafluorosilicate-17347-95-4.
- ↑ "Lithium hexafluorosilicate (CAS 17347-95-4)". Santa Cruz Biotechnology. https://www.scbt.com/p/lithium-hexafluorosilicate-17347-95-4.
- ↑ Macintyre, Jane E. (15 July 1993) (in en). Dictionary of Inorganic Compounds, Supplement 1. CRC Press. p. 303. ISBN 978-0-412-49090-3. https://books.google.com/books?id=SJepeRehoTIC&dq=lithium+hexafluorosilicate%E2%80%8E&pg=PA303. Retrieved 17 June 2024.
- ↑ Hinteregger; Wurst; Niederwieser; Heymann; Huppertz (1 March 2014). "Pressure-supported crystal growth and single-crystal structure determination of LiSiF" (in en). Zeitschrift für Kristallographie – Crystalline Materials 229 (2): 77–82. doi:10.1515/zkri-2013-1622. ISSN 2196-7105. https://www.degruyter.com/document/doi/10.1515/zkri-2013-1622/html. Retrieved 17 June 2024.
- ↑ Haynes, William M. (9 June 2015) (in en). CRC Handbook of Chemistry and Physics, 96th Edition. CRC Press. p. 4-72. ISBN 978-1-4822-6097-7. https://books.google.com/books?id=RpLYCQAAQBAJ&dq=lithium+hexafluorosilicate%E2%80%8E&pg=SA4-PA72. Retrieved 17 June 2024.
 |  |
