DOI: 10.1126/science.1142105. Body-Centered Cubic Iron-Nickel Alloy in Earth's Core

Body-Centered Cubic Iron-Nickel Alloy in Earth's Core

10.1126/science.1142105

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Cosmochemical, geochemical, and geophysical studies provide evidence that Earth's core contains iron with substantial (5 to 15%) amounts of nickel. The iron-nickel alloy Fe 0.9 Ni 0.1 has been studied in situ by means of angle-dispersive x-ray diffraction in internally heated diamond anvil cells (DACs), and its resistance has been measured as a function of pressure and temperature. At pressures above 225 gigapascals and temperatures over 3400 kelvin, Fe 0.9 Ni 0.1 adopts a body-centered cubic structure. Our experimental and theoretical results not only support the interpretation of shockwave data on pure iron as showing a solid-solid phase transition above about 200 gigapascals, but also suggest that iron alloys with geochemically reasonable compositions (that is, with substantial nickel, sulfur, or silicon content) adopt the bcc structure in Earth's inner core.

Bibliography

Dubrovinsky, L., Dubrovinskaia, N., Narygina, O., Kantor, I., Kuznetzov, A., Prakapenka, V. B., Vitos, L., Johansson, B., Mikhaylushkin, A. S., Simak, S. I., & Abrikosov, I. A. (2007). Body-Centered Cubic Iron-Nickel Alloy in Earthâs Core. Science, 316(5833), 1880â1883.

Authors 11

L. Dubrovinsky (first)
N. Dubrovinskaia (additional)
O. Narygina (additional)
I. Kantor (additional)
A. Kuznetzov (additional)
V. B. Prakapenka (additional)
L. Vitos (additional)
B. Johansson (additional)
A. S. Mikhaylushkin (additional)
S. I. Simak (additional)
I. A. Abrikosov (additional)

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The authors acknowledge financial support by the European Mineral Sciences Initiative (EuroMinSci) of the European Science Foundation Deutsche Forschungsgemeinschaft Swedish Research Council Carl Tryggers Foundation for Scientific Research Swedish Foundation for Strategic Research and Hungarian Scientific Research Fund. Help in sample preparation by A. Audétat and S. Dubravinsky is highly appreciated. Part of this work was performed at GeoSoilEnviroCARS (Sector 13). GeoSoilEnviroCARS is supported by NSF the U.S. Department of Energy–Geosciences and the State of Illinois.

Dates

Type	When
Created	18 years, 1 month ago (July 6, 2007, 4:55 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 3:20 a.m.)
Indexed	1 month ago (Aug. 6, 2025, 9:56 a.m.)
Issued	18 years, 2 months ago (June 29, 2007)
Published	18 years, 2 months ago (June 29, 2007)
Published Print	18 years, 2 months ago (June 29, 2007)

Funders 0

None

BibTeX

@article{Dubrovinsky_2007, title={Body-Centered Cubic Iron-Nickel Alloy in Earth’s Core}, volume={316}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1142105}, DOI={10.1126/science.1142105}, number={5833}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Dubrovinsky, L. and Dubrovinskaia, N. and Narygina, O. and Kantor, I. and Kuznetzov, A. and Prakapenka, V. B. and Vitos, L. and Johansson, B. and Mikhaylushkin, A. S. and Simak, S. I. and Abrikosov, I. A.}, year={2007}, month=jun, pages={1880–1883} }

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  "abstract": "<jats:p>\n            Cosmochemical, geochemical, and geophysical studies provide evidence that Earth's core contains iron with substantial (5 to 15%) amounts of nickel. The iron-nickel alloy Fe\n            <jats:sub>0.9</jats:sub>\n            Ni\n            <jats:sub>0.1</jats:sub>\n            has been studied in situ by means of angle-dispersive x-ray diffraction in internally heated diamond anvil cells (DACs), and its resistance has been measured as a function of pressure and temperature. At pressures above 225 gigapascals and temperatures over 3400 kelvin, Fe\n            <jats:sub>0.9</jats:sub>\n            Ni\n            <jats:sub>0.1</jats:sub>\n            adopts a body-centered cubic structure. Our experimental and theoretical results not only support the interpretation of shockwave data on pure iron as showing a solid-solid phase transition above about 200 gigapascals, but also suggest that iron alloys with geochemically reasonable compositions (that is, with substantial nickel, sulfur, or silicon content) adopt the bcc structure in Earth's inner core.\n          </jats:p>",
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      "unstructured": "The authors acknowledge financial support by the European Mineral Sciences Initiative (EuroMinSci) of the European Science Foundation Deutsche Forschungsgemeinschaft Swedish Research Council Carl Tryggers Foundation for Scientific Research Swedish Foundation for Strategic Research and Hungarian Scientific Research Fund. Help in sample preparation by A. Aud\u00e9tat and S. Dubravinsky is highly appreciated. Part of this work was performed at GeoSoilEnviroCARS (Sector 13). GeoSoilEnviroCARS is supported by NSF the U.S. Department of Energy\u2013Geosciences and the State of Illinois."
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