Thin films (0.0005 to 0.0007mm) were prepared, on glass substrates, by evaporation in vacuum at room temperature. In each case, a plateau ionic conductivity was found for AlF3/(NaF+AlF3) values of between 0.1 and 0.4. The maximum conductivity at room temperature was equal to 10-6S/m. The conductivity was explained in terms of MF6 octahedra.

J.M.Dance, T.Oi: Materials Research Bulletin, 1983, 18[3], 263-8