Self-diffusion and ionic conduction in single crystals were measured at 300 to 1400K. Three thermally activated processes were found to operate within this range. After heating, both the diffusion coefficient and the conductivity of as-grown samples underwent marked irreversible changes below 1100K. An activation energy of 1.2eV, and a Haven ratio of about 0.1, were determined in the intrinsic region.

Transport Properties of LaF3 Fast Ionic Conductor Studied by Field Gradient NMR and Impedance Spectroscopy. V.V.Sinitsyn, O.Lips, A.F.Privalov, F.Fujara, I.V.Murin: Journal of Physics and Chemistry of Solids, 2003, 64[7], 1201-5