Basic tin(II) sulphates

Abstract

Of the various basic tin(II) sulphates reported in the literature, the only one preparable as a clearly defined crystalline phase from aqueous solution is tritin(II) oxide dihydroxide sulphate, Sn₃(OH)₂OSO₄. The pure material can be obtained from solutions of pH 1·5–2·4 but precipitates obtained from solutions above pH 2·4 are not true basic salt phases. The dehydration of tritin(II) oxide dihydroxide sulphate at 230° and the subsequent decomposition of the product, tritin(II) dioxide sulphate, are discussed.