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American Mineralogist

Journal of Earth and Planetary Materials

Ed. by Baker, Don / Xu, Hongwu / Swainson, Ian


IMPACT FACTOR 2018: 2.631

CiteScore 2018: 2.55

SCImago Journal Rank (SJR) 2018: 1.355
Source Normalized Impact per Paper (SNIP) 2018: 1.103

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1945-3027
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Volume 95, Issue 1

Issues

Anisotropic elasticity of jarosite: A high-P synchrotron XRD study

Hongwu Xu
  • Corresponding author
  • Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Yusheng Zhao
  • Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Jianzhong Zhang
  • Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Yuejian Wang
  • Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Donald D. Hickmott
  • Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Luke L. Daemen
  • Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Monika A. Hartl
  • Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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/ Liping Wang
  • Department of Geosciences, State University of New York at Stony Brook, Stony Brook, New York 11794, U.S.A.
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Published Online: 2015-04-02 | DOI: https://doi.org/10.2138/am.2010.3280

Abstract

The elastic properties of jarosite were investigated using synchrotron X-ray diffraction coupled with a multi-anvil apparatus at pressures up to 8.1 GPa. With increasing pressure, the c dimension contracts much more rapidly than a, resulting in a large anisotropy in compression. This behavior is consistent with the layered nature of the jarosite structure, in which the (001) [Fe(O,OH)6]/[SO4] sheets are held together via relatively weak K-O and hydrogen bonds. Fitting of the measured unit-cell parameters to the second-order Birch-Murnaghan equation of state yielded a bulk modulus of 55.7 ± 1.4 GPa and zero-pressure linear compressibilities of 3.2 × 10-3 GPa-1 for the a axis and 13.6 × 10-3 GPa-1 for the c axis. These parameters represent the first experimental determination of the elastic properties of jarosite.

Keywords: Jarosite; elastic properties; compressibility; bulk modulus; equation of state; synchrotron X-ray diffraction

About the article

Received: 2009-04-28

Accepted: 2009-09-01

Published Online: 2015-04-02

Published in Print: 2010-01-01


Citation Information: American Mineralogist, Volume 95, Issue 1, Pages 19–23, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am.2010.3280.

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© 2015 by Walter de Gruyter Berlin/Boston.

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