The spin state of iron in minerals of Earth's lower mantle
Abstract
Here, the spin state of Fe(II) and Fe(III) at temperatures and pressures typical for the Earth's lower mantle is discussed. We predict an extended high-spin to low-spin crossover region along the geotherm for Fe-dilute systems depending on crystal-field splitting, pairing energy, and cooperative interactions. In particular, spin transitions in ferromagnesium silicate perovskite and ferropericlase, the dominant lower mantle components, should occur in a wide temperature-pressure range. We also derive a gradual volume change associated with such transitions in the lower mantle. The gradual density changes and the wide spin crossover regions seem incompatible with lower mantle stratification resulting from a spin transition.
- Authors:
-
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
- Carnegie Institution of Washington, Washington, DC (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 898678
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 32; Journal Issue: 12; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; IRON; SPIN; EARTH MANTLE; MINERALS; advanced photon source
Citation Formats
Sturhahn, Wolfgang, Jackson, Jennifer M., and Lin, Jung -Fu. The spin state of iron in minerals of Earth's lower mantle. United States: N. p., 2005.
Web. doi:10.1029/2005GL022802.
Sturhahn, Wolfgang, Jackson, Jennifer M., & Lin, Jung -Fu. The spin state of iron in minerals of Earth's lower mantle. United States. https://doi.org/10.1029/2005GL022802
Sturhahn, Wolfgang, Jackson, Jennifer M., and Lin, Jung -Fu. Thu .
"The spin state of iron in minerals of Earth's lower mantle". United States. https://doi.org/10.1029/2005GL022802. https://www.osti.gov/servlets/purl/898678.
@article{osti_898678,
title = {The spin state of iron in minerals of Earth's lower mantle},
author = {Sturhahn, Wolfgang and Jackson, Jennifer M. and Lin, Jung -Fu},
abstractNote = {Here, the spin state of Fe(II) and Fe(III) at temperatures and pressures typical for the Earth's lower mantle is discussed. We predict an extended high-spin to low-spin crossover region along the geotherm for Fe-dilute systems depending on crystal-field splitting, pairing energy, and cooperative interactions. In particular, spin transitions in ferromagnesium silicate perovskite and ferropericlase, the dominant lower mantle components, should occur in a wide temperature-pressure range. We also derive a gradual volume change associated with such transitions in the lower mantle. The gradual density changes and the wide spin crossover regions seem incompatible with lower mantle stratification resulting from a spin transition.},
doi = {10.1029/2005GL022802},
journal = {Geophysical Research Letters},
number = 12,
volume = 32,
place = {United States},
year = {Thu Jun 23 00:00:00 EDT 2005},
month = {Thu Jun 23 00:00:00 EDT 2005}
}
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Works referencing / citing this record:
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