Abstract

Structural characterization and ionic conductivity properties of the La1.33−xM3xTi2O6 (M=Li, Na and K) perovskite-type series are reported. From X-Ray diffraction data two different symmetries, tetragonal and orthorhombic, were observed as a function of the ionic size of alkaline cations as well as their proportion in the compounds. Crystallographic features seem to influence on the two possible conduction mechanisms. Orthorhombic samples allow the charge carriers motion through a 3D pathway whereas in the tetragonal ones mobile cations only can move into the A-planes in which are located.

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