Statistical mechanics, equilibrium phase diagrams

In the work of Haymet and Oxtoby the direct correlation function is approximated through statistical mechanical perturbation theory about its value for a uniform liquid of density Pq. This approach relies on the earlier work of Ramakrishnan and Youssouff who showed that such a jjerturbation approach gave rather accurate results for the equilibrium phase diagram for atomic liquids. One advantage of this approach is that the only external input to the functional 2 is the direct correlation of the liquid, which can be related to the structure factor, a quantity measurable by x-ray or neutron scattering... 

Rottman C. and Wortis M., Statistical Mechanics of Equilibrium Crystal Shapes Interfacial Phase Diagrams and Phase Transitions, Phys. Rep. 103, 59 (1984). 

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