It was found that the data for 63Ni diffusion could be described by:

5.8%Ni:     D (cm2/s) = 2.11 x 100 exp[-73.5(kcal/mol)/RT]

14.88%Ni:     D (cm2/s) = 5.0 x 100 exp[-75.6(kcal/mol)/RT]

J.R.MacEwan, J.U.MacEwan, L.Yaffe: Canadian Journal of Chemistry, 1959, 37, 1629-36