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Some considerations on the water polymorphism and the liquid-liquid transition by the density behavior in the liquid phase

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5095687· OSTI ID:1610145
 [1];  [2];  [2];  [2];  [3]
  1. Istituto dei Sistemi Complessi, Roma (Italy); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Nuclear Science and Engineering; DOE/OSTI
  2. Univ. di Messina (Italy)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Nuclear Science and Engineering
The bulk liquid water density data (ρ) are studied in a very large temperature pressure range including also the glass phases. A thorough analysis of their isobars, together with the suggestions of recent thermodynamical studies, gives evidence of two crossovers at T* and P* above which the hydrogen bond interaction is unable to arrange the tetrahedral network that is at the basis of the liquid polymorphism giving rise to the low density liquid (LDL). The curvatures of these isobars, as a function of T, are completely different: concave below P* (where maxima are) and convex above. In both the cases, a continuity between liquid and glass is observed with P* as the border of the density evolution toward the two different polymorphic glasses (low and high density amorphous). The experimental data of the densities of these two glasses also show a markedly different pressure dependence. Here, on the basis of these observations in bulk water and by considering a recent study on the growth of the LDL phase, by decreasing temperature, we discuss the water liquid-liquid transition and evaluate the isothermal compressibility inside the deep supercooled regime. Such a quantity shows an additional maximum that is pressure dependent that under ambient conditions agrees with a recent X-ray experiment. In particular, the present analysis suggests the presence of a liquid-liquid critical point located at about 180 MPa and 197 K.
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-90ER45429
OSTI ID:
1610145
Alternate ID(s):
OSTI ID: 1545411
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 4 Vol. 151; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Burton, E. F.; Oliver, W. F.
  • Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, Vol. 153, Issue 878, p. 166-172 https://doi.org/10.1098/rspa.1935.0229
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The Proton Density of States in Confined Water (H2O) journal October 2019
Specific Heat and Transport Functions of Water journal January 2020
Some Aspects of the Liquid Water Thermodynamic Behavior: From The Stable to the Deep Supercooled Regime journal October 2020
Supercooled water: A polymorphic liquid with a cornucopia of behaviors journal December 2019

Figures / Tables (7)