Gallium(III) sulfate

Gallium(III) sulfate
Names
Other names
  • Digallium trisulfate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • (anhydrous): 236-816-0
  • InChI=1S/2Ga.3H2O4S/c;;3*1-5(2,3)4/h;;3*(H2,1,2,3,4)/q2*+3;;;/p-6
    Key: UXLRWZBQRAWBQA-UHFFFAOYSA-H
  • (octadecahydrate): InChI=1S/2Ga.3H2O4S.18H2O/c;;3*1-5(2,3)4;;;;;;;;;;;;;;;;;;/h;;3*(H2,1,2,3,4);18*1H2/q2*+3;;;;;;;;;;;;;;;;;;;;;/p-6
    Key: RBIKSELZKJNPFC-UHFFFAOYSA-H
  • (anhydrous): [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Ga+3].[Ga+3]
  • (monohydrate): O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Ga+3].[Ga+3]
  • (octadecahydrate): O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Ga+3].[Ga+3]
Properties
Ga2(SO4)3
Molar mass 445.7 g/mol
Appearance White solid[1]
Density 3.86 g/cm3[2]
Melting point 680 °C (1,256 °F; 953 K)[1] (decomposes)
Slightly soluble[2]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P302+P352, P305+P351+P338
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
0
0
1
Related compounds
Other cations
 Aluminium sulfate, Indium(III) sulfate,
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Gallium(III) sulfate refers to the chemical compound, a salt, with the formula Ga2(SO4)3, or its hydrates Ga2(SO4)3·xH2O. Gallium metal dissolves in sulfuric acid to form solutions containing [Ga(OH2)6]3+ and SO42− ions. The octadecahydrate Ga2(SO4)3·18H2O crystallises from these solutions at room temperature. This hydrate loses water in stages when heated, forming the anhydrate Ga2(SO4)3 above 150 °C[3] and completely above 310 °C.[1] Anhydrous Ga2(SO4)3 is isostructural with iron(III) sulfate, crystallizing in the rhombohedral space group R3.[4]

  1. ^ a b c Cite error: The named reference synthesis was invoked but never defined (see the help page).
  2. ^ a b "Gallium(III) sulfate hydrate". Alfa Aesar. Retrieved 11 May 2021.
  3. ^ A. J. Downs, ed. (2012). Chemistry of Aluminium, Gallium, Indium and Thallium. Springer. p. 153. ISBN 9789401049603.
  4. ^ Krause, M.; Gruehn, R. (1995). "Contributions on the thermal behaviour of sulphates XVII.1 Single crystal structure refinements of In2(SO4)3 and Ga2(SO4)3". Z. Kristallogr. 210 (6): 427–431. Bibcode:1995ZK....210..427K. doi:10.1524/zkri.1995.210.6.427.