The diffusive behavior of 91Y at 1200 to 1600C was studied. The results could be described by:

D (cm2/s) = 6.7 x 10-3 exp[-68.1(kcal/mol)/RT]

D.S.Gornyi, R.M.Altovskii: Fizika Metallov i Metallovedenie, 1971, 31[4], 781-5

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)