High‐temperature heat capacity and lattice anharmonicity of LiGaO2

Abstract The first three even moments of the phonon density of states of LiGaO2and 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 LiGaO2are calculated. The results obtained for LiGaO2are compared with existing literature for other ternary lithium compounds. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)