A Refined EOS of bcc Bi up to 260 GPa

ORAL

Abstract

We present diamond anvil cell x-ray diffraction measurements of body-centered cubic Bi, stable above 10 GPa, up to 260 GPa in a neon pressure medium. The simple structure and high compressibility of bcc Bi make it appealing as a pressure calibrant in ultrahigh compression experiments. With these data we have been able to refine the equation of state over a wider pressure range than has previously been covered, and our new EOS parameters show a notable difference from previous work by our maximum pressure. Examination of the stress state of Bi and deviations from reported P-V curves attest to the importance of a soft pressure medium in reducing pressure anisotropy at extreme compression.

*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA's Office of Experimental Sciences. The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

–

Presenters

  • Daniel J Campbell

    • Lawrence Livermore National Laboratory

Authors

  • Daniel J Campbell

    • Lawrence Livermore National Laboratory

  • Daniel Sneed

    • Lawrence Livermore National Lab

  • Earl F O'Bannon

    • Lawrence Livermore Natl Lab

  • Per Soderlind

    • Lawrence Livermore National Laboratory

  • Zsolt J Jenei

    • Lawrence Livermore National Laboratory