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Electronic Transitions in Perovskite: Possible Nonconvecting Layers in the Lower Mantle
Abstract
We measured the spin state of iron in magnesium silicate perovskite (Mg 0.9 ,Fe 0.1 )SiO 3 at high pressure and found two electronic transitions occurring at 70 gigapascals and at 120 gigapascals, corresponding to partial and full electron pairing in iron, respectively. The proportion of iron in the low spin state thus grows with depth, increasing the transparency of the mantle in the infrared region, with a maximum at pressures consistent with the D″ layer above the core-mantle boundary. The resulting increase in radiative thermal conductivity suggests the existence of nonconvecting layers in the lowermost mantle.
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Cited by
The Redox State of Earth's Mantle
Frost, D. J., & McCammon, C. A. (2008) · Annual Review of Earth and Planetary Sciences · doi:10.1146/annurev.earth.36.031207.124322 · Cited by 1,134
Spin transition of iron in magnesiowüstite in the Earth's lower mantle
Lin, J.-F., Struzhkin, V. V., Jacobsen, S. D., Hu, M. Y., Chow, P., Kung, J., Liu, H., Mao, H.-K., & Hemley, R. J. (2005) · Nature · doi:10.1038/nature03825 · Cited by 351
Simmons, N. A., Myers, S. C., Johannesson, G., & Matzel, E. (2012) · Journal of Geophysical Research: Solid Earth · doi:10.1029/2012jb009525 · Cited by 349
Vankó, G., Neisius, T., Molnár, G., Renz, F., Kárpáti, S., Shukla, A., & de Groot, F. M. F. (2006) · The Journal of Physical Chemistry B · doi:10.1021/jp0615961 · Cited by 320
Saveleva, V. A., Ebner, K., Ni, L., Smolentsev, G., Klose, D., Zitolo, A., Marelli, E., Li, J., Medarde, M., Safonova, O. V., et al. (2021) · Angewandte Chemie International Edition · doi:10.1002/anie.202016951 · Cited by 82
Metadata
- Authors
- Badro, J., Rueff, J.-P., Vankó, G., Monaco, G., Fiquet, G., & Guyot, F.
- Venue
- Science
- Published
- 2004-07-16
- Volume
- 305
- Issue
- 5682
- Pages
- 383-386
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2039235095
- Cited by
- 373
- References
- 0
- FWCI
- 27.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- Badro, J., Rueff, J.-P., Vankó, G., Monaco, G., Fiquet, G., & Guyot, F. (2004). Electronic Transitions in Perovskite: Possible Nonconvecting Layers in the Lower Mantle. Science. https://doi.org/10.1126/science.1098840
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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
