Tracer and sectioning methods were used to study the diffusion of 59Fe at 922 to 793C. The results could be described by:

D (m2/s) = 5.3 x 10-3 exp[-1.90(eV)/kT]

D.L.Beke, I.Gödény, I.A.Szabo, G.Erdélyi, F.J.Kedves: Philosophical Magazine A, 1987, 55[42], 425-43