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Title: The structure of water around the compressibility minimum

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4902412· OSTI ID:1330509
ORCiD logo [1];  [2];  [3];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Stony Brook Univ., Stony Brook, NY (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

One of the many unusual properties of water is a minimum in the isothermal compressibility at 46.5°C. At higher or lower temperatures the structure of liquid water changes providing less resistance to pressure. Here we present high energy x-ray diffraction data over a wide range of momentum transfers that shows the 1st oxygen-oxygen shell expands linearly and has a constant coordination of 4.3(2) (measured up to 3.3 ) over the temperature range -19°C to 93°C. The second peak in the oxygen-oxygen pair distribution function, displays a continuous structural transition, concomitant with the compressibility minimum at 46.5°C. The least compressible form of water at ambient pressure is associated with an average nearest neighbor O-O distance of 2.810(5) and an average O-O-O angle of ~108°.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1330509
Journal Information:
Journal of Chemical Physics, Vol. 141, Issue 21; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

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Cited By (32)

High-temperature dynamic behavior in bulk liquid water: A molecular dynamics simulation study using the OPC and TIP4P-Ew potentials journal December 2017
The structural origin of anomalous properties of liquid water journal December 2015
Coherent X-rays reveal the influence of cage effects on ultrafast water dynamics journal May 2018
Machine learning coarse grained models for water journal January 2019
Interfacial premelting of ice in nano composite materials journal January 2019
On the accuracy of the MB-pol many-body potential for water: Interaction energies, vibrational frequencies, and classical thermodynamic and dynamical properties from clusters to liquid water and ice journal November 2016
Non-conformal coarse-grained potentials for water journal October 2017
Translational and rotational dynamics of high and low density TIP4P/2005 water journal June 2019
Intermediate range O–O correlations in supercooled water down to 235 K journal June 2019
Radial distribution functions of water: Models vs experiments journal July 2019
A proposal for the structure of high- and low-density fluctuations in liquid water journal July 2019
The interactions between thermodynamic anomalies journal July 2019
A coarse-grained deep neural network model for liquid water journal November 2019
On the temperature dependence of liquid structure journal January 2020
Experimental evidence of low-density liquid water upon rapid decompression journal February 2018
Ab initio thermodynamics of liquid and solid water journal January 2019
Do X-ray spectroscopies provide evidence for continuous distribution models of water at ambient conditions? journal August 2019
Intermediate range order in supercooled water journal February 2019
Temperature dependent anomalous fluctuations in water: shift of ≈1 kbar between experiment and classical force field simulations journal August 2019
Network topology of deeply supercooled water journal August 2019
X-ray studies of the transformation from high- to low-density amorphous water
  • Mariedahl, Daniel; Perakis, Fivos; Späh, Alexander
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2146 https://doi.org/10.1098/rsta.2018.0164
journal April 2019
Viscosity and real-space molecular motion of water: Observation with inelastic x-ray scattering journal August 2018
Maxima in the thermodynamic response and correlation functions of deeply supercooled water journal December 2017
Interfacial premelting of ice in nano composite materials text January 2019
Interfacial premelting of ice in nano composite materials text January 2019
Network topology of deeply supercooled water text January 2019
Network topology of deeply supercooled water text January 2019
Coherent X-rays reveal the influence of cage effects on ultrafast water dynamics text January 2018
Ab initio thermodynamics of liquid and solid water text January 2018
A coarse-grained deep neural network model for liquid water text January 2019
Reply to Pettersson et al.: Why X-ray spectral features are compatible to continuous distribution models in ambient water journal August 2019
Distinct signature of two local structural motifs of liquid water in the scattering function text January 2019

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