A dihydrate phase which contained the monohydrate, or dispersed alumina particles, exhibited a sudden increase in conductivity at the melting point (43C) of the dihydrate. The conductivity (0.1S/cm) at higher temperatures (130C) was equivalent to that of a good electrolyte. The material exhibited an activation energy of 13kJ/mol, and a Li+ ion transport number of 0.9.

O.Nakamura, J.B.Goodenough: Solid State Ionics, 1982, 7[2], 125-8