Solid solutions of the form, A1-xLi2xBO4, having a Scheelite-type structure were prepared and the Li ionic conduction was determined by means of electrochemical measurements and neutron radiography. It was found that, regardless of the A-site cation, the conductivities of the molybdates were higher than those of the tungstates. The highest conductivity was observed at the composition, x = 0.05, for each system. Neutron radiographic analysis showed that the Li-ion conduction could he attributed to interstitial Li ions in Ca0.95Li0.1MoO4, although a fairly high Li-ion diffusion due to thermal effects was observed.

Lithium Ion Conduction in Scheelite-Type Oxides and Analysis of Lithium Ion Motion by Neutron Radiography. M.Hayashi, H.Sakaguchi, S.Takai, T.Esaka: Solid State Ionics, 2001, 140[1-2], 71-6