Diffusion studies were carried out by depositing layers of the diffusing species, and annealing at 1161 to 2200C. The results could be described by:

D (cm2/s) = 6.1 x 10-1 exp[-94.9(kcal/mol)/RT]

D.Ablitzer, M.Gantois: Colloques de Métallurgie , 1976, 19, 299-316