Four-point resistivity measurements were used to study diffusion from a vacuum-evaporated Li layer. It was estimated that the Li diffusivity at 300 to 550C could be described by:

D (cm2/s) = 3.8 x 10-3 exp[-0.66(eV)/kT]

J.C.Larue: Physica Status Solidi A, 1971, 6[1], 143-51