Abstract
In this work, a new interionic potential function was derived for liquid alkali metals by applying some mathematical arguments on a recently modified potential. The number of the potential parameters of the new formulation was reduced due to such mathematical manipulation. The asymptotic behavior of the resulted potential function was verified by using the molecular parameters from the experimental structure factor. Experimental pVT data and a simple thermodynamic method were used to parameterize the potential function for liquid alkali metals (Na, K, Rb, Cs) near their melting points. The characterized potential functions are in good agreement with the potentials reported from the experimental structure factors.
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