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American Mineralogist

Journal of Earth and Planetary Materials

Ed. by Putirka, Keith / Swainson, Ian

12 Issues per year


IMPACT FACTOR 2017: 2.645

CiteScore 2017: 2.31

SCImago Journal Rank (SJR) 2017: 1.440
Source Normalized Impact per Paper (SNIP) 2017: 1.059

Online
ISSN
1945-3027
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Volume 97, Issue 10

Issues

High-pressure structural studies of eskolaite by means of single-crystal X-ray diffraction

Anastasia Kantor
  • Corresponding author
  • Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany
  • European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, CEDEX 9, France
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Innokenty Kantor / Marco Merlini
  • Universitа degli Studi di Milano, Dipartimento di Scienze della Terra, Via Botticelli 23, 20133 Milano, Italy
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Konstantin Glazyrin / Clemens Prescher / Michael Hanfland / Leonid Dubrovinsky
Published Online: 2015-04-02 | DOI: https://doi.org/10.2138/am.2012.4103

Abstract

The structural behavior of Cr2O3 was investigated up to ~70 GPa using single-crystal X-ray diffraction under a quasi-hydrostatic pressure (neon pressure medium) at room temperature. The crystal structure remains rhombohedral with the space group R3̄c (No. 167) and upon compression the oxygen atoms approach an ideal hexagonal close-packing arrangement. An isothermal bulk modulus of Cr2O3 and its pressure derivative were found to be 245(4) GPa and 3.6(2), respectively, based on a third-order Birch-Murnaghan equation of state and V0 = 288.73 Å3. An analysis of the crystal strains suggest that the non-hydrostatic stresses can be considered as negligible even at the highest pressure reached.

Keywords : High pressure; crystal structure; eskolaite

About the article

Received: 2012-01-12

Accepted: 2012-06-26

Published Online: 2015-04-02

Published in Print: 2012-10-01


Citation Information: American Mineralogist, Volume 97, Issue 10, Pages 1764–1770, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am.2012.4103.

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