Measurements were made of the relaxation time of 19F nuclei and of the conductivity of single crystals at temperatures of between 300 and 800K. Nuclear magnetic resonance methods were used to determine the parameters of cation and anion reorientation and diffusion. It was found that the conductivity of the cubic phase attained values of the order of 0.1S/m. It was shown that the main cause of the observed conductivity was the rapid diffusive motion of cations. The contribution which was made by the slow diffusion of cation complexes was negligible and was less than 0.001S/m in the cubic phase.

J.N.Moskvich, B.I.Cherkasov, A.A.Sukhovskii: Fizika Tverdogo Tela, 1986, 28[4], 1148-54 (Soviet Physics - Solid State, 1986, 28[4], 641-41)