Paper eintragenDifferential scanning calorimetry, X-ray diffraction, and alternating-current and direct-current conductivity methods were used to show that melt-grown samples had an hexagonal structure at room temperature. All of the samples exhibited conductive properties which suggested the occurrence of anionic vacancy diffusion. The room-temperature conductivity was equal to 1.11 x 10-5S/cm.

T.A.Kuku, A.M.Salau: Solid State Ionics, 1987, 25[1], 1-7