Abstract
The Narayan and Ramaseshan (NR) short-range repulsive potential function, extended up to second neighbours was used to study the mixed systems of NaBr x Cl (1 − x) , KBr x Cl (1 − x) , KI x Br (1 − x) , crystallizing into the rock salt structure. The cohesive energy E, isothermal bulk modulus ( B t ), the first and second order pressure derivatives ( dB t dp and d 2B t dp 2 ) of the isothermal bulk modulus of these mixed systems were evaluated using the NR potential. The computations were also extended to calculate the Grüneisen parameter (γ) and mode Grüneisen parameter ( q) using Slater, Dugdale and McDonald, and free volume theories. The results are discussed with the interpolated experimental data.
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