Calculation of a high-pressure equation of state from low-pressure properties

Values of the isochoric temperature dependence of isothermal incompressibility, ( ∂KT ∂T)V, are calculated for a monatomic face-centred cubic crystal, using the method of molecular dynamics and several assumed atomic potential functions. We argue that, for materials for which this quantity is experimentally determined at laboratory pressure, a high-pressure equation of state can be obtained from an appropriate combination of these potential functions, chosen to match the laboratory observations