Lithium hexafluorotungstate

Lithium hexafluorotungstate is an inorganic chemical compound with the chemical formula LiWF6.

Synthesis
Lithium hexafluorotungstate can be prepared by reacting lithium iodide and tungsten hexafluoride in liquid sulfur dioxide.

Physical properties
The compound has the LiSbF6 structure with unit cell parameters a=5.45 Å, α=57.4°.

Chemical properties
Lithium hexafluorotungstenate is unstable and decomposes in a vacuum at 50 °C. It can react in an alkaline solution of hypochlorite as follows:

2 LiWF6 + ClO− + 14 OH− → 2 Li+ + 2 WO42− + Cl− + 12 F− + 7 H2O