The surface-decrease method was used to study self-diffusion in single crystals. The diffusivity of 136Cl at 280 to 460C could be described by:

D (cm2/s) = 1.51 exp[-1.27(eV)/kT]

A comparison with electrical conductivity data indicated that the conductivity was essentially ionic, and that the anion defects were the most mobile. Schottky defects seemed to be the predominant type of point defect. The diffusion could not be completely accounted for in terms of single-vacancy movements. It was suggested that some contribution arose from vacancy pairs.

Self-Diffusion and Ionic Conductivity in Single Crystals of Cesium Chloride. P.J.Harvey, I.M.Hoodless: Philosophical Magazine, 1967, 16, 3408