It was found that data for W diffusion could be described by:

D (cm2/s) = 5.4 x 10-1 exp[-120.5(kcal/mol)/RT]

W.Danneberg: Metallwissenschaft und Technik, 1961, 10, 977

The best linear fits to the solute diffusion data ([5] to [25]) yield:

H (sd): Ln[Do] = 1.49E – 21 (R2 = 0.87); W(sd): Ln[Do] = 0.33E – 16.1 (R2 = 0.63)