Gallium perrhenate

Gallium perrhenate
Names
	IUPAC name Gallium rhenate(VII)
	Other names Gallium metaperrhenate
Identifiers
CAS Number	20302-15-2 anhydrous ; 20219-39-0 4.5 hydrate ; octahydrate: 200636-11-9 ;
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;81H2;;;;;;;;;;;;;;;/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.^[2] The anhydrous form can be obtained by reacting gallium(III) oxide and rhenium(VII) oxide at 450 °C.^[1]

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

2 Ga(ReO₄)₃ → 3 Re₂O₇ + Ga₂O₃

^ ^a ^b 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.
^ 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.
^ 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.