Gallium perrhenate

Chemical compound From Wikipedia, the free encyclopedia

Gallium perrhenate is an inorganic compound with the chemical formula of Ga(ReO4)3. It exists in the anhydrous and hydrate forms.

Quick facts Names, Identifiers ...
Gallium perrhenate
Names
IUPAC name
Gallium rhenate(VII)
Other names
Gallium metaperrhenate
Identifiers
3D model (JSmol)
  • 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
  • [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
Ga(ReO4)3
Molar mass 820.344
Appearance White deliquescent crystals (anhydrous)[1]
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).
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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.[2] The anhydrous form can be obtained by reacting gallium(III) oxide and rhenium(VII) oxide at 450 °C.[1]

Chemical properties

Gallium perrhenate decomposes above 300 °C to form rhenium(VII) oxide and gallium(III) oxide:[3]

2 Ga(ReO4)3 → 3 Re2O7 + Ga2O3

References

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