The migration of 14C was studied at 1500 to 1800C. The data could be described by:

D (cm2/s) = 3.45 x 10-3 exp[-37.8(kcal/mol)/RT]

A.Shepela: Journal of the Less-Common Metals, 1972, 26[1], 33-43

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)