UDC 662.21

Aditya M. Vora

THERMODYNAMIC PROPERTIES OF LIQUID METALS USING
PERCUS-YEVICK (PY) HARD SPHERE REFERENCE SYSTEM

The Gibbs-Bogoliubov inequality is used to evaluate the Helmholtz 
free energy of some liquid metals. The structural contribution 
to this energy is investigated by adopting the Percus<196>Yevick (PY) 
hard sphere fluid. A well-known single parametric empty core local 
pseudopotential of Ashcroft is applied to describe the electron<196>ion 
interaction along with five different local field correction functions, 
viz, Hartree, Taylor, Ichimaru-Utsumi, Farid et al., and Sarkar 
et al. The difference from 2.18 to 28.00% in the influence on the 
Helmholtz free energy is concluded to be due to these local field 
correction functions with respect to the static Hartree dielectric 
function. A qualitative agreement with experimental or theoretical 
results is achieved.

Keywords: Thermodynamic properties; pseudopotential theory; 
PY hard sphere model; liquid metals.

Parmeshwari 165, Vijaynagar Area, Hospital Road, Bhuj - Kutch, 370 001, 
Gujarat, India; email: voraam@yahoo.com. 
Original article submitted September 28, 2007; revision 
submitted October 24, 2008.