Thallous Metatungstate, Tl₂W₄O₁₃

Thallous Metatungstate, Tl₂W₄O₁₃.3H₂O, is obtained in a similar manner to the analogous silver salt. It is a yellowish-white, almost insoluble, crystalline powder which loses 2 molecular proportions of water at 90° C.