The diffusive behavior of D was studied at 110 to 930K. The results could be described by:

D (cm2/s) = 3.1 x 10-4 exp[-0.073(eV)/kT]

R.Cantelli, F.M.Mazzolai, M.Nuovo: Journal of the Physics and Chemistry of Solids, 1970, 31, 1811-7