The migration of divalent and trivalent cations was investigated, by using tracer and sectioning techniques, at about 500 to 750C under conditions of heterodiffusion at infinite dilution. Here Co2+, although it was reported to exhibit anomalous diffusion in this chloride, furnished very good diffusion profiles of the carrier-free isotope 58Co. Analysis of the results indicated that, for Co2+, the migration enthalpy was equal to 0.76eV. The migration entropy was equal to -2.84k. The overall Co diffusivities could be described by:

D (cm2/s) = 7.6 x 10-2 exp[-1.33(eV)/kT]

F.Bénière, K.V.Reddy: Journal of the Physics and Chemistry of Solids, 1986, 47[1], 69-77