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A spin on lower mantle mineralogy

  • Jeffrey S. Pigott EMAIL logo
Published/Copyright: January 9, 2016
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American Mineralogist
From the journal American Mineralogist Volume 101 Issue 1

Abstract

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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  1. Manuscript handled by Keith Putirka.

Received: 2015-7-13
Accepted: 2015-7-22
Published Online: 2016-1-9
Published in Print: 2016-1-1

© 2016 by Walter de Gruyter Berlin/Boston

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https://doi.org/10.2138/am-2016-5497
Keywords for this article
Iron; spin transition; bridgmanite; high pressure

Articles in the same Issue

  1. Highlights and Breakthroughs
  2. A spin on lower mantle mineralogy
  3. Highlights and Breakthroughs
  4. Safe long-term immobilization of heavy metals: Looking at natural rocks
  5. Highlights and Breakthroughs
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