An investigation was made of self-diffusion by using ionic conductivity, tracer diffusion (serial sectioning) and drift mobility methods. The Na-diffusion data, for 640 to 790C, could be described by:

D (cm2/s) = 6.2 x 102 exp[-2.21(eV)/kT]

V.C.Nelson, R.J.Friauf: US Atomic Energy Commission Report COO-1197-30, 1968

The best linear fits to the solute diffusion data ([382] to [383], [391] to [397], [403] to [405]) yield:

Cs: Ln[Do] = 0.29E – 9.9 (R2 = 0.73); Na: Ln[Do] = 0.57E – 22.4 (R2 = 0.99);

Sr: Ln[Do] = 0.55E – 20.5 (R2 = 0.51)