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.

v t e Lithium compounds (list)
Inorganic (list)	Li₂ LiAlCl₄ Li_1+xAl_xGe_2−x(PO₄)₃ LiAlH₄ LiAlO₂ LiAl_1+xTi_2−x(PO₄)₃ LiAs LiAsF₆ Li₃AsO₄ LiAt Li[AuCl₄] LiB(C₂O₄)₂ LiB(C₆F₅)₄ LiWF₆ LiBF₄ LiBH₄ LiBO₂ LiB₃O₅ Li₂B₄O₇ LiAsF₆ Li₂SnF₆ Li₂TiF₆ Li₂ZrF₆ Li₂B₄O₇·5H₂O LiBSi₂ LiBr LiBr·2H₂O LiBrO LiBrO₂ LiBrO₃ LiBrO₄ Li₂C₂ LiCF₃SO₃ CH₃CH(OH)COOLi LiC₂H₂ClO₂ LiC₂H₃IO₂ Li(CH₃)₂N LiCHO₂ LiCH₃O LiC₂H₅O LiCN Li₂CN₂ LiCNO Li₂CO₃ Li₂C₂O₄ LiCl LiCl·H₂O LiClO LiFO LiClO₂ LiClO₃ LiClO₄ LiCoO₂ Li₂CrO₄ Li₂CrO₄·2H₂O Li₂Cr₂O₇ CsLiB₆O₁₀ LiD LiF Li₂F LiF₄Al Li₃F₆Al FLiBe LiFePO₄ FLiNaK LiGaH₄ Li₂GeF₆ Li₂GeO₃ LiGe₂(PO₄)₃ LiH LiH₂AsO₄ Li₂HAsO₄ LiHCO₃ Li₃H(CO₃)₂ LiH₂PO₃ LiH₂PO₄ LiHSO₃ LiHSO₄ LiHe LiI LiIO LiIO₂ LiIO₃ LiIO₄ Li₂IrO₃ Li₇La₃Zr₂O₁₂ LiMn₂O₄ Li₂MoO₄ Li_0.9Mo₆O₁₇ LiN₃ Li₃N LiNH₂ Li₂NH LiNO₂ LiNO₃ LiNO₃·H₂O Li₂N₂O₂ LiNa Li₂NaPO₃ LiNaNO₂ LiNbO₃ Li₂NbO₃ LiO⁻ LiO₂ LiO₃ Li₂O Li₂O₂ LiOH Li₃P LiPF₆ Li₃PO₄ Li₂HPO₃ Li₂HPO₄ Li₃PO₃ Li₃PO₄ Li₂Po Li₂PtO₃ Li₂RuO₃ Li₂S LiSCN LiSH LiSO₃F Li₂SO₃ Li₂SO₄ Li[SbF₆] Li₂Se Li₂SeO₃ Li₂SeO₄ LiSi Li₂SiF₆ Li₄SiO₄ Li₂SiO₃ Li₂Si₂O₅ LiTaO₃ Li₂Te LiTe₃ Li₂TeO₃ Li₂TeO₄ Li₂TiO₃ Li₄Ti₅O₁₂ LiTi₂(PO₄)₃ LiVO₃·2H₂O Li₃V₂(PO₄)₃ Li₂WO₄ LiYF₄ Neodymium-doped LiZr₂(PO₄)₃ Li₂ZrO₃
Organic (soaps)	Hemolithin (extraterrestrial protein) Organolithium reagents Gilman reagent CH₃COOLi C₄H₆LiNO₄ LiC₂F₆NO₄S₂ LiN(SiMe₃)₂ Li₃C₆H₅O₇ C₅H₅Li LiN(C₃H₇)₂ (C₆H₅)₂PLi C₁₈H₃₅LiO₃ C₆H₁₃Li C₄H₉Li CH₃CHLiCH₂CH₃ (CH₃)₃CLi C₁₂H₂₈BLi CH₃Li Li⁺C₁₀H−8 C₅H₁₁Li C₅H₃LiN₂O₄ C₆H₅Li LiC₂CH₃ LiO₂C(CH₂)₁₆CH₃ C₄H₅LiO₄ LiEt₃BH LiOC(CH₃)₃ C₉H₁₈LiN LiC₂H₃ Vinyllithium LiC ₁₁H ₂₃COO
Minerals	Amblygonite Berezanskite Brannockite Cryolithionite Darapiosite Darrellhenryite Elbaite Fluorine Elbaite Fluor-liddicoatite Emeleusite Eucryptite LiAlSiO₄ Faizievite Hectorite Hsianghualite Jadarite LiNaSiB₃O₇OH Keatite Li(AlSi₂O₆) Kunzite Lavinskyite Lepidolite Lithiophilite LiMnPO₄ Lithiophosphate Li₃PO₄ Manandonite Manganoneptunite Nambulite Neptunite Olympite Petalite LiAlSi₄O₁₀ Pezzottaite Cs(Be₂Li)Al₂Si₆O₁₈ Rossmanite Saliotite Sogdianite Spodumene LiAl(SiO₃)₂ Sugilite Tiptopite Tourmaline Triphylite LiFePO₄ Zabuyelite Li₂CO₃ Zektzerite Zinnwaldite
Hypothetical	Li_xBe_y HLiHe⁺ LiFHeO LiHe₂ (HeO)(LiF)₂ La_2⁄3–xLi_3xTiO₃He
Other Li-related	Aluminium–lithium alloys Heteroatom-promoted lateral lithiation LB buffer Lithium atom Lithium medication LiNi_xCo_yAl_zO₂ LiNi_xMn_yCo_zO₂ Lithium soap Lithium Triangle Lucifer yellow Magnesium–lithium alloys NASICON Environmentally friendly red light flare

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