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We have calculated the thermodynamic properties and elastic constants of a rigid-ion model of sodium chloride, at zero pressure, using a combination of Monte Carlo simulations at high temperatures (300--1050 K) and anharmonic perturbation theory at low temperatures. While the results were intended as a benchmark for the simple model we have used, the agreement with experiment is remarkably good.
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Gong et al. (1988) studied this question.
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