The kinetics of bulk-to-surface Sn diffusion in a (111) single crystal of dilute alloy was investigated, at 678 to 794K, by using Auger electron spectroscopy and low-energy electron diffraction. Modified Darken equations were used,

together with sputter-time corrections, to deduce the diffusion coefficient from the kinetic data. The diffusion data could be described by:

D(cm2/s) = 7 x 10-2exp[-168(kJ/mol)/RT]

E.C.Viljoen, J.Du Plessis, H.C.Swart, G.N.Van Wyk: Surface Science, 1995, 342, 1-10