Nickel Orthosilicate, Ni₂SiO₄

Nickel Orthosilicate, Ni₂SiO₄, has been prepared by prolonged heating to redness of amorphous silica intimately mixed with nickel oxide and chloride. It yields greenish yellow crystals of density 4.85.

An acid silicate, of composition NiO.5SiO₂.4H₂O, is described as resulting by the interaction of sodium silicate and a nickel salt in aqueous solution.