It was noted that, in these ternary systems, extensive domains of O-deficient F-type solid solution were stabilized at room temperature. Electrical studies showed that these materials exhibited very promising conductivities.

A New Oxide Ion Conductor Family. T.Guedira, M.Laourayed, S.E.Elyoubi, A.Rhandour: Annales de Chimie – Science des Materiaux, 2000, 25[8], 645-52