EXTENDED PRIMITIVE MODELS OF WATER REVISITED

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