Ionic conductivity of single-crystal Na5YSi4O12

Abstract

We have investigated the single-crystal ionic conductivity of Na5YSi4O12. The conductivity is found to exhibit a thermally activated temperature dependence between 200 and 500 K with activation energies of 0.221 and 0.203 eV parallel and perpendicular to the hexagonal c axis. Room-temperature conductivities were determined to be 0.0032 and 0.008 (Ω cm)−1.