A microprobe study of interdiffusion in the BaF2-SrF2 system was carried out, at temperatures of between 1033 and 1238C, using single crystals. Extrapolation

of these values to infinite dilution permitted the Ba self-diffusivity in SrF2 to be deduced:

D (cm2/s) = 3.01 x 103 exp[-92.0(kcal/mol)/RT]

Interdiffusion in the System SrF2-BaF2. R.W.Scheidecker, M.F.Berard: Journal of the American Ceramic Society, 1976, 59[9-10], 431-3