Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.245701
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom
- Engineering and Physical Sciences Research Council [EP/K014560/1, EP/G007489/2, EP/J017639/1, EP/F032773/1] Funding Source: researchfish
- EPSRC [EP/G007489/2, EP/J017639/1, EP/F032773/1, EP/K014560/1] Funding Source: UKRI
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Computational searches for stable and metastable structures of water ice and other H:O compositions at TPa pressures have led us to predict that H2O decomposes into H2O2 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 H2O comes into contact with hydrogen. Metallization of H2O is predicted at a higher pressure of just over 6 TPa, and therefore H2O 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.
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