Lithium hexafluorosilicate

Lithium hexafluorosilicate
Names
	IUPAC name dilithium; hexafluorosilicon(2-)
	Other names Dilithium hexafluorosilicate
Identifiers
CAS Number	17347-95-4;
3D model (JSmol)	Interactive image;
ChemSpider	11254702;
ECHA InfoCard	100.037.595
EC Number	241-372-6;
PubChem CID	13629069;
	InChI InChI=1S/F6Si.2Li/c1-7(2,3,4,5)6;;/q-2;2*+1 Key: QSDQCOGGZWIADS-UHFFFAOYSA-N;
	SMILES [Li+].[Li+].F[Si-2](F)(F)(F)(F)F;
Properties
Chemical formula	F6Li2Si
Molar mass	155.96 g·mol−1
Appearance	White powder
Density	2.33 g/cm3
Solubility in water	soluble
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	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 Li₂SiF₆.^[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]

H₂[SiF₆] + 2LiOH → Li₂[SiF₆] + 2H₂O

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". American Elements. American Elements. Retrieved 17 June 2024.
^ "Lithium hexafluorosilicate (CAS 17347-95-4)". Santa Cruz Biotechnology. Retrieved 17 June 2024.
^ Macintyre, Jane E. (15 July 1993). Dictionary of Inorganic Compounds, Supplement 1. CRC Press. p. 303. ISBN 978-0-412-49090-3. Retrieved 17 June 2024.
^ Hinteregger; Wurst; Niederwieser; Heymann; Huppertz (1 March 2014). "Pressure-supported crystal growth and single-crystal structure determination of LiSiF". Zeitschrift für Kristallographie – Crystalline Materials. 229 (2): 77–82. doi:10.1515/zkri-2013-1622. ISSN 2196-7105. Retrieved 17 June 2024.
^ Haynes, William M. (9 June 2015). CRC Handbook of Chemistry and Physics, 96th Edition. CRC Press. p. 4-72. ISBN 978-1-4822-6097-7. Retrieved 17 June 2024.

[1] "Lithium Hexafluorosilicate". American Elements. American Elements. Retrieved 17 June 2024.

[2] "Lithium hexafluorosilicate (CAS 17347-95-4)". Santa Cruz Biotechnology. Retrieved 17 June 2024.

[3] Macintyre, Jane E. (15 July 1993). Dictionary of Inorganic Compounds, Supplement 1. CRC Press. p. 303. ISBN 978-0-412-49090-3. Retrieved 17 June 2024.

[4] Hinteregger; Wurst; Niederwieser; Heymann; Huppertz (1 March 2014). "Pressure-supported crystal growth and single-crystal structure determination of LiSiF". Zeitschrift für Kristallographie – Crystalline Materials. 229 (2): 77–82. doi:10.1515/zkri-2013-1622. ISSN 2196-7105. Retrieved 17 June 2024.

[5] Haynes, William M. (9 June 2015). CRC Handbook of Chemistry and Physics, 96th Edition. CRC Press. p. 4-72. ISBN 978-1-4822-6097-7. Retrieved 17 June 2024.

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