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          Institute: Fritz-Haber-Institut     Collection: Theory     Display Documents

ID: 340845.0, Fritz-Haber-Institut / Theory
Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale
Authors:Goncharov, Alexander F.; Crowhurst, Jonathan C.; Dewhurst, John K.; Sharma, Sangeeta; Sanloup, Chrystele; Gregoryanz, Eugene; Guignot, Nicolas; Mezouar, Mohamed
Date of Publication (YYYY-MM-DD):2007-06-21
Title of Journal:Physical Review B
Journal Abbrev.:Phys. Rev. B
Issue / Number:22
Start Page:224114-1
End Page:224114-6
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The equation of state of cubic boron nitride (cBN) has been determined to a maximum temperature of 3300 K at a simultaneous static pressure of up to more than 70 GPa. Ab initio calculations to 80 GPa and 2000 K have also been performed. Our experimental data can be reconciled with theoretical results and with the known thermal expansion at 1 bar if we assume a small increase in pressure during heating relative to that measured at ambient temperature. The present data combined with the Raman measurements we presented earlier form the basis of a high-temperature pressure scale that is good to at least 3300 K.
External Publication Status:published
Document Type:Article
Communicated by:Matthias Scheffler
External Affiliations:Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015, USA

Lawrence Livermore National Laboratory, University of California, 7000 East Avenue, Livermore, California 94551, USA
School of Chemistry, The University of Edinburgh, Edinburgh, United Kingdom

Institut für Theoretische Physik, Freie Universität Berlin, Berlin, Germany

Université Pierre et Marie Curie and Insitut de Physique du Globe de Paris, Paris, France

School of Physics and Center for Science at Extreme Conditions, University of Edinburgh, Edinburgh, United Kingdom

European Synchrotron Radiation Facility, Grenoble, France
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