Measurements were made of the diffusion of 86Rb, at temperatures of between 525 and 675C, in pure single crystals. The diffusion parameters were determined, in the high-temperature region, from a least-squares straight-line Arrhenius plot. The results could be described by:

D (cm2/s) = 55 exp[-2.01(eV)/kT]

Ionic Conductivity and Self-Diffusion in Pure RbBr. H.L.Downing, R.J.Friauf: Physical Review B, 1975, 12[12], 5981-9

Figure 9

Diffusion of Cl in the TlBr-TlCl System