The dihydrate, SnCl2(OH2)·H2O, and the less well-known SnCl3·SnCl(OH2)2·H2O, were compared with regard to protonic conduction. A similarity was noted between the 2 hydrates, with regard to the H-bonded network, but no phase transition was detected in the case of the lower hydrate.

J.Pirnat, Z.Trontelj: Solid State Ionics, 1999, 125[1-4], 135-40