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American Mineralogist

Journal of Earth and Planetary Materials

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

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

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Volume 101, Issue 1


A spin on lower mantle mineralogy

Jeffrey S. Pigott
  • Corresponding author
  • Department of Earth, Environmental, and Planetary Sciences, Case Western Reserve University, Cleveland, Ohio, 44106, U.S.A.
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Published Online: 2016-01-09 | DOI: https://doi.org/10.2138/am-2016-5497


Constraining the spin state of Fe in Earth's lower mantle is critical to understanding the chemistry and dynamics of Earth's interior. In the October 2015 issue of American Mineralogist, Dorfman et al. present an experimental study of the effect of iron concentration on the spin transition in bridgmanite. Their experiments involved two different bridgmanite compositions (38 and 74% FeSiO3). Based on the total spin moment determined by synchrotron-based X-ray emission spectroscopy, they show that Fe2+ in bridgmanite is in the high-spin state in the lower mantle but transition pressure decreases within highly enriched iron concentrations.

Keywords: Iron; spin transition; bridgmanite; high pressure

References cited

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About the article

Received: 2015-07-13

Accepted: 2015-07-22

Published Online: 2016-01-09

Published in Print: 2016-01-01

Manuscript handled by Keith Putirka.

Citation Information: American Mineralogist, Volume 101, Issue 1, Pages 1–2, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am-2016-5497.

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© 2016 by Walter de Gruyter Berlin/Boston.

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