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Related Experiment Video

Updated: May 9, 2026

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

Published on: June 18, 2020

Proton dynamics in ice VII at high pressures.

Y Finkelstein¹, R Moreh

¹Nuclear Research Center-Negev, Beer-Sheva, Israel.

The Journal of Chemical Physics

|August 2, 2013

Summary

Proton kinetic energies in ice decrease with increasing pressure, nearing symmetric hydrogen bonding. These findings align with similar studies on other hydrogen-bonded materials.

Area of Science:

Materials Science
Condensed Matter Physics
Physical Chemistry

Background:

High-pressure studies of ice are crucial for understanding planetary interiors.
Hydrogen bonding in ice exhibits complex behavior under extreme conditions.
Proton kinetic energy is a key parameter in characterizing hydrogen bonds.

Purpose of the Study:

To calculate proton kinetic energies (Ke(H)) in ice under high pressures.
To investigate the relationship between pressure, hydrogen bond symmetry, and Ke(H).
To compare findings with other hydrogen-bonded systems.

Main Methods:

Utilized the harmonic approximation for calculations.
Incorporated literature data for optical frequencies and H2O geometry.

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Published on: June 18, 2020

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Calculated Ke(H) at 298 K for ice VII up to 63 GPa.

Main Results:

Ke(H) values showed a gradual decrease with increasing pressure.
The results indicate an approach towards symmetric hydrogen bonding (OH-O).
Calculations for D2O were also performed, showing similar trends.

Conclusions:

Proton kinetic energy in ice is sensitive to pressure-induced structural changes.
The observed trend supports theoretical models of hydrogen bond symmetrization.
Findings provide insights into the behavior of water under extreme pressure conditions.