High‐temperature heat capacity and lattice anharmonicity of LiGaO₂

Abstract

The first three even moments of the phonon density of states of LiGaO 2 and the anharmonic contribution to the heat capacity at constant volume of the compound are estimated from experimental heat capacity data. The effect of lattice anharmonicity is discussed in terms of perturbation theory. The temperature dependent principal Grüneisen functions of LiGaO 2 are calculated. The results obtained for LiGaO 2 are compared with existing literature for other ternary lithium compounds.