Gallium perrhenate
# Gallium perrhenate

Gallium perrhenate is an inorganic compound with the chemical formula of $Ga(ReO_4)_3.$ It exists in the anhydrous and hydrate forms.

## Preparation

Gallium can be anodically dissolved in perrhenic acid at 50-55 °C, and dried with sulfuric acid to obtain the hydrate crystal $[Ga(H_2O)_6(ReO_4)_3]·2H_2O.$ The anhydrous form can be obtained by reacting gallium(III) oxide and rhenium(VII) oxide at 450 °C.

## Chemical properties

Gallium perrhenate decomposes above 300 °C to form rhenium(VII) oxide and gallium(III) oxide:

    2 $Ga(ReO_4)_3$ → 3 $Re_2O_7$ + $Ga_2O_3$
