The diffusion of 59Fe was studied in 5N-purity material at 975 to 1400C. The diffusion coefficient could be described by:

D (cm2/s) = 1.16 x 10-3 exp[-9.56(kcal/mol)/RT]

H.S.Wang, Y.P.Gupta: Acta Metallurgica, 1968, 16[1], 53-9