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3D model (JSmol) |
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ChemSpider |
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PubChem CID |
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CompTox Dashboard (EPA) |
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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: | |
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Warning | |
H315, H319, H335 | |
P302+P352, P305+P351+P338 | |
NFPA 704 (fire diamond) | |
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).
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Gallium(III) sulfate refers to the chemical compound, a salt, with the formula Ga2(SO4)3, or its hydratesGa2(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 anhydrateGa2(SO4)3 above 150 °C[3] and completely above 310 °C.[1] Anhydrous Ga2(SO4)3isisostructural with iron(III) sulfate, crystallizing in the rhombohedral space groupR3.[4]
Gallium(III) sulfate is prepared from the reaction of hydroxygallium diacetate and sulfuric acid. The two reactants were mixed at 90 °C and left for 2 days which produced the octadecahydrate. Then, it was dried in a vacuum for 2 hours which created the extremely hygroscopic anhydrous form. The overall reaction is below:
After the production, it was confirmed to be the simple salt, Ga2(SO4)3, by x-ray diffraction.[1]
When heated over 680 °C, gallium sulfate gives off sulfur trioxide, yielding gallium(III) oxide.[1] A gallium sulfate solution in water mixed with zinc sulfate can precipitate ZnGa2O4.[5]
Basic gallium sulfate is known with the formula (H3O)Ga3(SO4)2(OH)6.[6]
Double gallium sulfates are known with composition NaGa3(SO4)2(OH)6, KGa3(SO4)2(OH)6, RbGa3(SO4)2(OH)6, NH4Ga3(SO4)2(OH)6. These compounds are isostructural with jarosite and alunite. Jarosite and alunite can contain a small amount of gallium substituted for iron or aluminium.[6] Organic base double gallium sulfates can contain different core structures, these can be chains of [Ga(SO4)3]3-, [Ga(OH)(SO4)2]2- or [Ga(H2O)2(SO4)2]− or sheets of [Ga(H2O)2(SO4)2]− units.[7]
formula | mw | crystal system |
space group |
unit cell Å | volume | density | properties | reference | |
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(H3O)Ga3(SO4)2(OH)6 | R3m | a=7.18 c=17.17 z=1.5 | 766 | [8] | |||||
Ga4(OH)10SO4 | [9] | ||||||||
NH4Ga3(SO4)2(OH)6 | [7] | ||||||||
trisodium gallium sulfate | Na3Ga(SO4)3 | tetragonal | a = 9.451 c = 7.097 | [10] | |||||
NaGa3(SO4)2(OH)6 | [7] | ||||||||
KGa3(SO4)2(OH)6 | [7] | ||||||||
RbGa3(SO4)2(OH)6 | [7] | ||||||||
Caesium gallium sulfate dodecahydrate | CsGa(SO4)2•12H2O | cubic | Pa3 | Z=4 | 2.127 | refractive index=1.461 | [11] | ||
dimethylammonium gallium sulfate hexahydrate | (CH3)2NH2Ga(SO4)2·6H2O | ferroeelastic | [12][13] | ||||||
guanidinium gallium sulfate | [C(NH2)3]Ga(SO4)2·6H2O | hexagonal | P31m | a=11.82 c=9.13 | ferroelectric | [14] | |||
Ethylenediammonium acid gallium sulfate | [C2H10N2][H3O][Ga(SO4)3] | [7] | |||||||
Ethylenediammonium basic gallium sulfate | [C2H10N2][Ga(OH)(SO4)2]·H2O | [7] | |||||||
Tetramethylenediammonium gallium sulfate | [C4H14N2][Ga(H2O)2(SO4)2]2 | [7] | |||||||
Hexamethylenediammonium gallium sulfate | [C6H18N2][Ga(H2O)2(SO4)2]2 | [7] |
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: CS1 maint: multiple names: authors list (link)
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Gallium(-V) |
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Gallium(I) |
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Gallium(II) |
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Gallium(I,III) |
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Gallium(III) |
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