The diffusion coefficients of Li+ ions in the melt were determined, by using the capillary reservoir method, at temperatures ranging from the melting point upwards. There was a close correlation between the apparent activation energy for solute diffusion, and the heat of mixing of solute and solvent salts at infinite dilution. It was found that the data for temperatures ranging from 800 to 991C could be described by:

D (cm2/s) = 1.42 x 10-3 exp[-6.38(kcal/mol)/RT]

T.Ejima, T.Yamamura, H.Hisamoto: Journal of the Japan Institute of Metals, 1977, 41[7], 742-9