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 1020K, could be described by:

D (cm2/s) = 0.71 exp[-1.508(eV)/kT]

Isothermal Diffusion of 54Mn in Pure NaCl and KCl and of 85Sr in KCl. S.J.C.Rushbrook-Williams, A.R.Allnatt: Journal of Physics - C, 1977, 10[8], 1151-7

Table 69

Isotope Effect for 22Na and 24Na in KCl Single Crystals

Figure 16

Diffusion of Ne in KCl