The Effective Potential Function of the Liquid Mercury on the Metallic and Nonmetallic States by Using the Experimental Internal Pressure

Document Type : Research Paper


The major reason for the prediction of thermodynamic properties of mercury lies in the fact that its
intermolecular interactions highly depend on temperature and density. Internal pressure is a good criterion to
investigate the density dependence of the interatomic interactions. Because its physical base is a force
tending to close together the molecules that is intermolecular interactions, and as well it can be calculated
from the experimental PVT data. In this study the behavior of the experimentally calculated internal
pressure of the mercury demonstrates three different metallic, M-NMT and nonmetallic regions. Then to
investigate these different states the general form of the Lennard-Jones potential function [LJ (m-n)] has been
chosen as the effective interaction potential and the experimentally calculated internal pressure has been used
to estimate the values of m and n in each state.