Lithium hexafluorogermanate

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Lithium hexafluorogermanate
IUPAC name
Lithium hexafluorogermanate
Other names
Lithium germanium fluoride
3D model (JSmol)
  • InChI=1S/F6Ge.2Li/c1-7(2,3,4,5)6;;/q-2;2*+1
  • [Li+].[Li+].F[Ge-2](F)(F)(F)(F)F
  • [Li+].[Li+].F[Ge-2](F)(F)(F)(F)F
Molar mass 200.51 g/mol
Appearance white solid
Melting point 510 °C (950 °F; 783 K)
53.9 g / 100 g water (25°C)
NFPA 704 (fire diamond)
Safety data sheet (SDS) External MSDS
Related compounds
Related compounds
Gadolinium oxysulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Lithium hexafluorogermanate is the inorganic compound with the formula Li2GeF6. It forms a solid off-white deliquescent powder. When exposed to moisture, it easily hydrolyses to release hydrogen fluoride and germanium tetrafluoride gases.[1]

Reactions and applications[edit]

Lithium hexafluorogermanate can be dissolved in a solution of hydrogen fluoride, which forms a precipitate of lithium fluoride.[2]

It can be used as a densification aid in the sintering of gadolinium oxysulfide,[3][4] and as a lithium salt additive in a lithium-ion battery electrolyte.[5]


  1. ^ "Lithium Hexafluorogermanate Safety Data Sheet" (PDF). Lorad Chemical Corporation. Retrieved 2017-09-20.
  2. ^ Tychinskaya, I.I., Opalovskii, A.A. & Nikolaev, N.S. Russ Chem Bull (1965) 14: 725.
  3. ^ L. S. Bolyasnikova, V. A. Demidenko, S. B. Eron'ko, O. P. Ovsyannikova, and S. B. Mikhrin, "Gd2O2S:Pr:Ce Optical Scintillation Ceramics and their Properties," J. Opt. Technol. 73, 138-142 (2006).
  4. ^ "Lithium Hexafluorogermanate". Lorad Chemical Corporation. Retrieved 2017-09-19.
  5. ^ CN application 103326066, Gong Weihua, "Lithium-ion battery electrolyte", published 2013-09-25, assigned to Suzhou Nuoxin Innovation Energy Co. Ltd.