Sodium hexafluoroantimonate is an inorganic chemical compound with the chemical formula .

Synthesis Sodium hexafluoroantimonate may be synthesised by oxidation of antimony trioxide with bromine trifluoride:

Or it may be formed by reaction of antimony and sodium fluorides:

Physical properties Sodium hexafluoroantimonate forms colorless crystals, soluble in water. It crystallizes in the cubic Pa3 space group with unit cell dimension of a=0.820 Å.

Chemical properties Sodium hexafluoroantimonate undergoes slow partial hydrolysis in aqueous solutions.

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