Is there a second critical point in liquid water?

H. E. Stanley, Charles Angell, U. Essmann, M. Hemmati, P. H. Poole, F. Sciortino

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The supercooled and stretched regions of the phase diagram of simulated liquid water are investigated by calculating the equation of state of the ST2 and TIP4P pair-potentials. We find that simulated water does not display a re-entrant spinodal and that the projection of the density maximum line in the plane of pressure and temperature becomes positively sloped on stretching. The well-known anomalous behavior of supercooled water is tentatively associated with the existence of an inaccessible critical point. Evidence is presented that suggests the association of this new critical point with the transition between low density and high density amorphous solid water. We show how the observed transformation behavior of the two forms of amorphous solid water can be explained in terms of a first order phase transition, via a consideration of the limits of metastability associated with this kind of transition, and support this interpretation with simulations of the amorphous solid. We therefore propose a phase diagram which accounts for the behavior of both liquid and amorphous solid water.

Original languageEnglish (US)
Pages (from-to)122-139
Number of pages18
JournalPhysica A: Statistical Mechanics and its Applications
Volume205
Issue number1-3
DOIs
StatePublished - Apr 1 1994

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Critical point
critical point
Liquid
Water
liquids
water
Phase Diagram
phase diagrams
Metastability
First-order Phase Transition
Equation of State
metastable state
Anomalous
equations of state
projection
Projection
Line
Simulation
simulation
temperature

ASJC Scopus subject areas

  • Mathematical Physics
  • Statistical and Nonlinear Physics

Cite this

Is there a second critical point in liquid water? / Stanley, H. E.; Angell, Charles; Essmann, U.; Hemmati, M.; Poole, P. H.; Sciortino, F.

In: Physica A: Statistical Mechanics and its Applications, Vol. 205, No. 1-3, 01.04.1994, p. 122-139.

Research output: Contribution to journalArticle

Stanley, HE, Angell, C, Essmann, U, Hemmati, M, Poole, PH & Sciortino, F 1994, 'Is there a second critical point in liquid water?', Physica A: Statistical Mechanics and its Applications, vol. 205, no. 1-3, pp. 122-139. https://doi.org/10.1016/0378-4371(94)90495-2
Stanley, H. E. ; Angell, Charles ; Essmann, U. ; Hemmati, M. ; Poole, P. H. ; Sciortino, F. / Is there a second critical point in liquid water?. In: Physica A: Statistical Mechanics and its Applications. 1994 ; Vol. 205, No. 1-3. pp. 122-139.
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