Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 6, Pages 1258-1261Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.1258
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The recent discovery of a new solid phase of carbon dioxide (CO2-V) has made it apparent that the properties of this vital chemical species are drastically altered under high pressure conditions. The reported transition at around 40 GPa from the Cmca phase (CO2-III), which is a molecular solid, into the novel phase, which was observed to be quartzlike, clearly suggests a dramatic change of the chemical, electronic, and structural properties. We here present a theoretical analysis of the implications of this metamorphosis. At even higher pressures, we predict the existence of a very hard phase of the stishovite type.
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