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A comparison between the available self-diffusion data on pure molten salts and the predictions by different liquid diffusion theories is made. It is found that the Arrhenius equation D=D 0 exp (— Q/R T) describes the experimental data equally well (or better) than any of the other theoretically predicted equations. The hole model prediction (Q=3.74 R T m ) is found to be inaccurate. The free volume model and the local density fluctuation models describe the data less well than the other models considered. The cubic cell model leads to a correct correlation between self-diffusion and kinematic viscosity for several salts (but not all).

BERICHT: Self-Diffusion in Molten Salts. A Comparison Between Diffusion Theories and Experimental Data