Abstract
In the present paper and analysis of vibrational anharmonic properties of a number of antifluorite structure crystals [K 2SnCl 6, K 2ReCl 6, K 2PtBr 6, (NH 4) 2SnCl 6,(NH 4) 2PtBr 6 and (NH 4) 2TeCl 6] has been performed in terms of higher order elastic constants and their linear combinations, pressure and temperature derivatives of their second order elastic constants (SOEC) and Gruneisen parameters. These physical quantities have been calculated by making use of a phenomonological potential model. It has been found that the three-body interactions considered in the present potential model plays an important and significant role in explaining the characteristic behaviour of the crystals under study. Good agreement between the experimental and theoretical values has been obtained.
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