Slater-Kirkwood formula

This is summed over all probe (p)-target (t) atom pairs and is a function of the distance, rj, between the atoms in the pair, which have van der Waals radii, Rj, and R,. A = 0.5C(Rj, + R,) and C is given by the Slater-Kirkwood formula [18] and is dependent on atomic polarizability and the number of effective electrons per atom. 

Original author calculated on a different basis— used Slater-Kirkwood dispersion formula instead of isoelectronic compound. 

This is similar in spirit to the arithmetic-mean rule but with each individual r,) being weighted according to the square of its value. The well depth in this function starts with a formula proposed by Slater and Kirkwood for the Cg coefficient of the dispersion series expansion ... 

Both types of functions are commonly used. Several sets of a, b, c, and d, coefficients are available [1-3]. Equally good results can be obtained using Lennard-Jones-type functions alone or Buckingham-type functions alone or mixtures of Lennard-Jones and Buckingham functions [4]. The attraction coefficients in these expressions are generally but not always calculated with the formula of Slater and Kirkwood [5] ... 

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