Decomposition and Terapascal phases of water ice.

Computational searches for stable and metastable structures of water ice and other H:O compositions at TPa pressures have led us to predict that H(2)O decomposes into H(2)O(2) and a hydrogen-rich phase at pressures of a little over 5 TPa. The hydrogen-rich phase is stable over a wide range of hydrogen contents, and it might play a role in the erosion of the icy component of the cores of gas giants as H(2)O comes into contact with hydrogen. Metallization of H(2)O is predicted at a higher pressure of just over 6 TPa, and therefore H(2)O does not have a thermodynamically stable low-temperature metallic form. We have also found a new and rich mineralogy of complicated water ice phases that are more stable in the pressure range 0.8-2 TPa than any predicted previously.

• Publication year

  2013

• Venue

  Physical Review Letters

• Publication date

  2013-06-11

• Fields of study

  Materials Science, Physics, Medicine, Environmental Science

• Identifiers
  DOI 10.1103/PhysRevLett.110.245701arXiv 1306.5704PMID 25165937
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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