The chronopotentiometric method was used to study the diffusion of Fe2+ in molten equimolecular mixtures at 964 to 1182K. The results were described by:

D (cm2/s) = 6.53 x 10-3 exp[-9.81(kcal/mol)/RT]

Measurement of the Diffusion Coefficients of Iron(II) Ions in a Fused Equimolar Mixture of Potassium and Sodium Chlorides by the Chronopotentiometric Method. N.I.Kornilov, V.E.Solomatin, N.G.Ilyushchenko: Elektrokhimiya, 1969, 5[8], 945-6