Data on defect formation and diffusion in magnetite were used to analyze tracer diffusion data for Co. The diffusivities, at 906 to 1210C, were separated into interstitial and vacancy components. The results could be described by:

vacancy: D (cm2/s) = 2.23 x 10-11 exp[17400K/T]

interstitial: D (cm2/s) = 8.03 x 107 exp[73600K/T]

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