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Polymeric Carbon Dioxide

Published online by Cambridge University Press:  15 February 2011

Choong-Shik Yoo*
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94551, yool@llnl.gov
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Abstract

Synthesis of polymeric carbon dioxide has long been of interest to many chemists and materials scientists. Very recently we discovered the polymeric phase of carbon dioxide (called CO2-V) at high pressures and temperatures. Our optical and x-ray results indicate that CO2-V is optically non-linear, generating the second harmonic of Nd: YLF laser at 527 nm and is also likely superhard similar to cubic-boron nitride or diamond. COz-V is made of CO4 tetrahedra, analogous to SiO2 polymorphs, and is quenchable at ambient temperature at pressures above 1 GPa. In this paper, we describe the pressure-induced polymerization of carbon dioxide together with the stability, structure, and mechanical and optical properties of polymeric CO2-V. We also present some implications of polymeric CO2 for high-pressure chemistry and new materials synthesis.

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Type
Research Article
Copyright
Copyright © Materials Research Society 2000

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