Possible diffusion paths in this material were considered. It was found that the preferred path was strongly affected by the distribution of ions between Li and Nb sites. Site-swapping was important for the creation of non-stoichiometric material and for impurity incorporation. Published reports of diffusion rates were compared with the possible diffusion mechanisms. It was noted that Ti, which was thought to substitute mainly for Nb, appeared to diffuse more rapidly on the Li sub-lattice in Li-deficient samples.

D.P.Birnie: Journal of Materials Science, 1993, 28[2], 302-15