A new ferroelectric: Guanidinium uranyl sulfate trihydrate.

Abstract

Dielectric behaviour studies have been carried out on (C(NH2) 3) 2) - UO2 - (SO4)2 - 3H2O, a member of the family of guanidinium sulfate hydrates. The uranyl compound, which is not isomorphous with G.A.S.H., is ferroelectric from about 100°C (decomposition temperature) down to -30 °C , the lowest we have employed. Domain structure and etch-pit configuration are quite similar to those observed in G.A.S.H.