It was found that these La2/3-xLi3xTiO3 and La2/3-xLi3xNb2O6 compounds had perovskite structures for x-values between 1/24 and 1/6 and between 0 and 3/10, respectively. The electrical data for both types of perovskite indicated a high Li-ion conductivity.

A.G.Belous: Solid State Ionics, 1996, 90[1-4], 193-6