It was found that the data for 900 to 1250C, could be described by:

D (cm2/s) = 1.28 x 10-1 exp[-64.5(kcal/mol)/RT]

M.Badia, A.Vignes: Comptes Rendus de l’Academie des Sciences, 1967, 264, 858-61

The best linear fit to the solute diffusion data ([658] to [660]) yields:

Ni: Ln[Do] = 0.22E – 15.3 (R2 = 0.86)