A simple potential for the water intermolecular potential, consisting of hard spheres with a point dipole and a potential well with the symmetry of a tetrahedral octupole was proposed by Bratko, Blum, and Luzar some time ago. This structural model was formally solved by Blum, Cummings, and Bratko, and explicit solutions have been recently obtained. We show here that this very simple model agrees surprisingly well with the experimental pair correlation functions of Soper and Phillips. The agreement with the gOH(r) and gHH(r) functions is quite good. For the gOO(r) the agreement is not as good, but this has to do with the hard core nature of the potential. Analytical solutions for soft spherical cores exist.
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Blum et al. (1995) studied this question.
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