The diffusion of Fe2+ ions was found, using the serial sectioning technique, to proceed substitutionally at 232 to 449C. The results could be described by:

D (cm2/s) = 1.51 x 101 exp[-1.27(eV)/kT]

D.L.Foster, A.L.Laskar: Physica Status Solidi A, 1975, 29[1], 167-72