Potassium Titanisulphate, K₂Ti(SO₄)₃

Potassium Titanisulphate, K₂Ti(SO₄)₃, is produced by melting together titanic oxide and potassium pyrosulphate.

The alkaline earth salts, CaTi(SO₄)₃, SrTi(SO₄)₃, and Ba₂Ti₃(SO₄)₈, are formed when TiO₂ dissolved in concentrated sulphuric acid is mixed with a sulphuric acid solution of the corresponding sulphate and the resulting solution is concentrated. These salts are decomposed by water with precipitation of titanic acid.