Gallium perrhenate

Gallium perrhenate

Names
IUPAC name Gallium rhenate(VII)
Other names Gallium metaperrhenate
Identifiers
CAS Number	20302-15-2 anhydrous Y 20219-39-0 4.5 hydrate Y octahydrate: 200636-11-9 Y
3D model (JSmol)	Interactive image octahydrate: Interactive image
InChI InChI=1S/Ga.12O.3Re/q+3;;;;;;;;;;3*-1;;; Key: VCLQMDAITPMMSA-UHFFFAOYSA-N octahydrate: InChI=1S/Ga.8H2O.12O.3Re/h;8*1H2;;;;;;;;;;;;;;;/q+3;;;;;;;;;;;;;;;;;;3*-1;;; Key: NEAJZHJYRFFORQ-UHFFFAOYSA-N
SMILES [Ga+3].O=[Re](=O)(=O)[O-].O=[Re](=O)(=O)[O-].O=[Re](=O)(=O)[O-] octahydrate: [Ga+3].O=[Re](=O)(=O)[O-].O=[Re](=O)(=O)[O-].O=[Re](=O)(=O)[O-].O.O.O.O.O.O.O.O
Properties
Chemical formula	Ga(ReO4)3
Molar mass	820.344
Appearance	White deliquescent crystals (anhydrous)
Solubility in water	Soluble
Related compounds
Other anions	Gallium nitrate Gallium perchlorate
Other cations	Potassium perrhenate
Related compounds	Rhenium(VII) oxide Perrhenic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Gallium perrhenate is an inorganic compound with the chemical formula of Ga(ReO₄)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(H₂O)₆(ReO₄)₃]·2H₂O. 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(ReO₄)₃ → 3 Re₂O₇ + Ga₂O₃

References