The diffusion of Mg impurity was investigated by using secondary ion mass spectroscopy. The temperature dependence of the Mg diffusivity, at 870 to 1073K, could described by,

D (cm2/s) = 2.8 x 10-3 exp[-1.5/T]

By combining data on the self-diffusion of cations, with the results of ionic conductivity measurements, an estimate was made of the thermodynamic parameters which characterized the jump of a diffusant. Calculated frequencies of the impurity ion jump to the cation vacancy were obtained.

Investigation of Diffusion of Magnesium in Lithium Fluoride Crystals by the SIMS Method. A.P.Surzhikov, A.V.Chernyavskii, S.A.Ghyngazov, T.S.Frangulyan: Russian Physics Journal, 2002, 45[12], 1190-4