By using the serial sectioning technique, the diffusion coefficients for carrier-free 54Mn in pure halide single crystals were measured in the intrinsic conductivity region as a function of temperature. The data, for temperatures ranging from 880 to 1010K, could be described by:

D (cm2/s) = 1.63 x 10-2 exp[-1.366(eV)/kT]

S.J.C.Rushbrook-Williams, A.R.Allnatt: Journal of Physics - C, 1977, 10[8], 1151-7