It was found that the data for 185W, at 1400 to 2200C, could be described by:

D (cm2/s) = 3.33 x 100 exp[-92.0(kcal/mol)/RT]

K.G.Kreider, G.Bruggemann: Transactions of the Metallurgical Society of AIME, 1967, 239, 1222-6

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)