Data on defect formation and diffusion in magnetite were used to analyze tracer diffusion data for Co. The diffusivities, at 1210 to 1410C, were separated into interstitial and vacancy components. The results could be described by:

vacancy: D (cm2/s) = 5.12 x 10-9 exp[880K/T]

interstitial: D (cm2/s) = 3.84 x 109 exp[90500K/T]

R.Dieckmann, M.R.Hilton, T.O.Mason: Berichte der Bunsengesellschaft für Physikalische Chemie, 1987, 91[1], 59-66