A 4-site extended primitive model of water descending from the TIP4 potential has been reexamined over a range of the model parameters. It has been found, in contrast to recently reported results (Nezbeda, I., and Slovak, J., 1997, Molec. Phys., 90, 353), that the model clearly is superior to 5-site models descending from the ST2 potential and yields the liquid structure in very good agreement with that of real water.
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