Gallium perrhenate

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

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).
Infobox references

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
  1. Baud, Gilbert; Capestan, Michel (1968). "Gallium perrhenate and its hydrates". Comptes Rendus de l'Académie des Sciences, Série C (in French). 266 (6): 382–384. ISSN 0567-6541.
  2. Vol'fkovich, A. Yu.; Khrustalev, V. N.; Shamrai, N. B.; Varfolomeev, M. B. (1997). "Electrochemical synthesis of aluminum, gallium, and indium perrhenates". Zhurnal Neorganicheskoi Khimii (in Russian). 42 (12): 1960–1962. ISSN 0044-457X.
  3. 谢高阳 等主编 (ed.). "3.13.3 含氧酸及其盐类". 第九卷 锰分族 铁系 铂系 [Volume IX Manganese Group Iron Series Platinum Series]. 无机化学丛书. 科学出版社. p. 116.
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