Self-diffusion measurements were carried out under an excess Cd vapour pressure, by using radiotracer and serial sectioning techniques, and the results were combined with previous data. It was found that the Arrhenius plot could be divided (at 780C) into 2 separate straight-line sections with differing slopes. The data could be described by:

D (cm2/s) = 4.2 x 10-2 exp[-1.90(eV)/kT]

above 780C, and by:

D (cm2/s) = 5.2 x 104 exp[-3.18(eV)/kT]

at lower temperatures.

E.D.Jones, N.M.Stewart, V.Thambipillai: Journal of Crystal Growth, 1989, 96[2], 453-5