The diffusivity of 59Fe tracer in monocrystalline samples of 5N-purity material was determined by using serial sectioning techniques. It was found that the results could be described by:

D (cm2/s) = 1.9 x 100 exp[-49.36(kcal/mol)/RT]

at 780 to 940C.

S.Bharati, S.Badrinarayanan, A.P.B.Sinha: Physica Status Solidi A, 1977, 43[2], 653-8