Abstract
Two sets of experimental data about the Kirkendall effect and interdiffusion coefficients in alkali halides with a common ion are presented as a contribution to test the present theory of interdiffusion in ionic crystals. It is proved that a measurable Kirkendall shift can be observed in these materials (e.g. NaCl-KCl interdiffusion at 903K), i.e. that the common anions are able to move during interdiffusion. A comparison between calculated and experimental values of the interdiffusion coefficients in KI-RbI at 875K leads to a reexamination of some of the accepted theoretical assumptions.
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