The diffusion of 59Fe was studied in 5N-purity single crystals. At temperatures above 800C, the diffusivity could be described by:

D (cm2/s) = 2.2 x 100 exp[-50.0(kcal/mol)/RT]

J.Bernardini, A.Combe-Brun, J.Cabane: Comptes Rendus de l’Academie des Sciences, 1969, 269[4], 287-9