Zinc fluoride

Zinc fluoride is an inorganic chemical compound. It is encountered as the anydrous form and also as the tetrahydrate, ZnF₂ · 4H₂O. It has a high melting point and has the rutile structure containing 6 coordinate zinc, which suggests appreciable ionic character in its chemical bonding. Unlike the other zinc halides, ZnCl₂, ZnBr₂ and ZnI₂, it is not very soluble in water.

Preparation and reactions

Zinc fluoride can be synthesized several ways.

Reaction of a fluoride salt with zinc chloride, to yield zinc fluoride and a chloride salt, in aqueous solution.
The reaction of zinc metal with fluorine gas.
Reaction of hydrofluoric acid with zinc, to yield hydrogen gas and zinc fluoride.

Zinc fluoride can be hydrolysed by hot water to form the zinc hydroxyfluoride, ZnF.

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