New high-pressure phases of ice.

@article{Demontis1988NewHP,
  title={New high-pressure phases of ice.},
  author={Demontis and LeSar and Klein},
  journal={Physical review letters},
  year={1988},
  volume={60 22},
  pages={
          2284-2287
        }
}
An ionic model has been used in conjunction with classical constant-pressure molecular-dynamics calculations to explore the properties of possible high-pressure phases of ice. Around 100 GPa, the model is found to convert from the symmetric hydrogen-bonded cuprite structure (ice X) to a fully ordered antifluorite structure. On heating, the new phase, ice XI, becomes a fast-ion proton conductor. 
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