It was found that the data could be described by:

772 to 1048C:     D (cm2/s) = 3.4 x 10-1 exp[-64.3(kcal/mol)/RT]

1192 to 1297C:     D (cm2/s) = 1.0 x 10-1 exp[-60.2(kcal/mol)/RT]

K.Hirano, R.P.Agarwala, B.L.Averbach, M.Cohen: Journal of Applied Physics, 1962, 33, 3049-54