Ammonium hexafluorovanadate is an inorganic chemical compound with the chemical formula .

Synthesis Ammonium hexafluorovanadate can be prepared the solid state reaction of vanadium trioxide and ammonium bifluoride. Another method involves the solid state reaction of vanadium(III) fluoride with ammonium fluoride.

Reactions The compound decomposes to vanadium pentoxide if heated in open air:

Related compounds An ammonium hexafluorovanadate(V) with the formula NH4VF6 has been reported.

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