Abstract
Anharmonic contributions to the equation of state of solids are derived in closed form from a local mean-field potential for the atomic motion within the framework of the classical free-volume theory. The mean-field potential is calculated thereby from one cold isotherm and a series expansion of the partition function results in a good approximation for the anharmonic contribution up to the quartic terms. Quantum corrections are added to the classical terms to represent accurately experimental data for Cu, Ag, and Au.
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