Structure, Bonding, and Mineralogy of Carbon at Extreme Conditions
Open Access
- 1 January 2013
- journal article
- Published by Mineralogical Society of America in Reviews in Mineralogy and Geochemistry
- Vol. 75 (1) , 47-77
Abstract
The nature and extent of Earth’s deep carbon cycle remains uncertain. This chapter considers high-pressure carbon-bearing minerals, including those of Earth’s mantle and core, as well as phases that might be found in the interiors of larger planets outside our solar system. These phases include both experimentally produced and theoretically predicted polymorphs of carbon dioxide, carbonates, carbides, silicate-carbonates, as well as very high-pressure phases of pure carbon. One theme in the search for possible high P-T, deep-Earth phases is the likely shift from sp2 bonding (trigonal coordination) to sp3 bonding (tetrahedral coordination) in carbon-bearing phases of the...Keywords
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