The diffusion coefficients of Ni2+ cations were measured at 903K by using a porous diaphragm in molten mixtures of KCl-LiCl eutectic, plus mole fractions of NiCl2 of between 0.01 and 0.2. It was found that the diffusion coefficient decreased, from 3 x 10-5 to 10-5cm2/s, with increasing NiCl2 concentration over the above range. The results were explained in terms of the formation of 2-centered complex ions of Ni2Cl62- in concentrated melts.

A.N.Elshin, M.A.Budimirov, N.N.Batalov: Elektrokhimiya, 1993, 29[11], 1339-42 (Russian Journal of Electrochemistry, 1993, 29[11], 1169-72)