Cooperative molecular motions in water: The liquid-liquid critical point hypothesis

We discuss the hypothesis that, in addition to the known critical point in water (below which two fluid phases — a lower-density gas and a higher-density liquid — coexist), there exists a “second” critical point at low temperatures (below which two liquid phases — a higher-density liquid and a lower...

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Bibliographic Details
Published in:Physica A 1997-02, Vol.236 (1), p.19-37
Main Authors: Stanley, H.E., Cruz, L., Harrington, S.T., Poole, P.H., Sastry, S., Sciortino, F., Starr, F.W., Zhang, R.
Format: Article
Language:English
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Summary:We discuss the hypothesis that, in addition to the known critical point in water (below which two fluid phases — a lower-density gas and a higher-density liquid — coexist), there exists a “second” critical point at low temperatures (below which two liquid phases — a higher-density liquid and a lower-density liquid — can coexits). We also discuss briefly some of the evidence relating to this hypothesis. This evidence is rather tentative at the present time, and is largely based on a growing number of computer simulations using the ST2 and TIP4P intermolecular potentials. We also discuss selected experimental results that are consistent with this hypothesis.
ISSN:0378-4371
1873-2119
DOI:10.1016/S0378-4371(96)00429-3