Thallous persulphate, Tl₂S₂O₈

Thallous persulphate, Tl₂S₂O₈, prepared by double decomposition between ammonium persulphate and thallous sulphate, or by the electrolysis of thallous sulphate in a divided cell, forms monoclinic crystals isomorphous with the ammonium salt. It is isomeric with thallothallic sulphate, Tl₂SO₄.Tl (SO₄)₈.