Indium silicotungstates

Indium silicotungstate is very soluble in water, and two hydrates may be crystallised out from the solution. The first, of the composition 2In₂O₈.3(SiO₂.12WO₃).93H₂O, forms regular octahedra, while the second, with 63H₂O, is triclinic (a:b:c = 0.6025:1:0.7864; α = 85°10', β = 106°3', γ = 90°12'). The acid salt, In₂O₃.H₂O.2(SiO₂.12WO₃).40H₂O, forms monoclinic crystals (a:b:c = 0.9552:1:0.6544; β = 96°.32').