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The double identity of ice X

Author

Listed:
  • José Teixeira

    (the Laboratoire Léon Brillouin (CNRS/CEA))

Abstract

In ordinary ice, molecules share a hydrogen atom; but the hydrogen is positioned asymmetrically, closer to one oxygen atom than the other. Under high enough pressure, however, the potential energy curve should change into one with a single minimum, and the hydrogen atom should then sit mid-way between the oxygens, making a symmetric, atomic crystal, ‘ice X’. A new simulation shows that symmetry occurs even earlier, as the quantum-mechanical nature of the of the H atom makes it sit centrally over a small maximum in the energy curve — so there are two kinds of ice X.

Suggested Citation

  • José Teixeira, 1998. "The double identity of ice X," Nature, Nature, vol. 392(6673), pages 232-233, March.
    • Handle: RePEc:nat:nature:v:392:y:1998:i:6673:d:10.1038_32542
    DOI: 10.1038/32542
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