It was found that the data O diffusion in polycrystalline and monocrystalline material, at 800 to 1200C, could be described by:

monocrystalline:     D (cm2/s) = 7.9 x 104 exp[-73.9(kcal/g-atom)/RT]

polycrystalline:     D (cm2/s) = 9.5 x 104 exp[-74.4(kcal/g-atom)/RT]

R.Barlow, P.J.Grundy: Journal of Materials Science, 1969, 4[9], 797-801

The best linear fits to the solute diffusion data ([1063] to [1068], [1076] to [1078], [1080] to [1105], [1114] to [1117], [1120] to [1123]) yield:

Cu: Ln[Do] = 0.37E – 22.7 (R2 = 0.98); Fe: Ln[Do] = 0.33E – 21.4 (R2 = 0.998);

H: Ln[Do] = 0.66E – 11.5 (R2 = 0.46); Ni: Ln[Do] = 0.47E – 31.8 (R2 = 0.999);

O: Ln[Do] = 0.38E – 18.4 (R2 = 0.75)