Thallic chlorate, Tl(ClO₃)₃

Thallic chlorate, Tl(ClO₃)₃.4H₂O, forms deliquescent, rhombic crystals. Thallous perchlorate, TlClO₄, may be obtained in aqueous solution by dissolving thallium in aqueous perchloric acid, or by mixing barium perchlorate and thallous sulphate. It crystallises in rhombic tablets (a:b:c = 0.7978:1:1.2898) of density 4.844, and begins to decompose at 300°. The solubility, in grams of anhydrous salt per 100 grams of water, is 10.0 at 15° and 166.6 at 100°.

Thallous perchlorate forms a complete series of mixed crystals with potassium perchlorate, with which it is isomorphous.