The diffusion of Li+ was investigated by performing isotopic exchange between crystals, and solutions of C4H9Li in octane and cyclohexane. The exchange took place in 2 stages; exchange reaction in the surface layer, and subsequent diffusion in the interior of the solid phase. The diffusivity of Li at 18C was deduced to be equal to 3 x 10-16cm2/s.

G.Y.Ryskin, E.K.Shalkova: Zhurnal Fizicheskoi Khimii, 1977, 51[1], 43-6