liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Structural properties of Fe1-xNix compressed and heated to the Earth's core conditions
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics .
2008 (English)In: FPLO Workshop,2008, Dresden: Germany , 2008Conference paper (Refereed)
Abstract [en]

Cosmochemical, geochemical, and geophysical studies provide evidences that Earth's core contains iron with substantial (5 to 15 at. %) amounts of nickel and/or impurities of light elements. The results of our combined first-principles study and in-situ and temperature-quenched laser-heated diamond anvil-cell experiments on the high-pressure high-temperature structural behavior of pure Fe and Fe_0.9 Ni_0.1 alloy are reported. Our temperature-quenched experiments indicate that the face-centered cubic (fcc) phase of pure iron can exist in the pressure-temperature region above 160 GPa and 3700 K. In accord our theoretical results show that the fcc phase of Fe becomes as stable as the hexagonal-close-packed (hcp) phase at Earth's core condition (P ~ 300-360 GPa and T around 5000-6000 K). Further we demonstrate by means of in-situ angle-dispersive x-ray diffraction in internally heated diamond anvil cells (DACs) that by substantial alloying of Fe with Ni (10 at. %) a body-centered cubic phase can stabilize in the Earth's core. Our results give an evidence that the actual structure of the the Earth's core could be a complex phase, which is very sensitive to the presence of impurities of nickel, sulfur, silicon, etc. 

Place, publisher, year, edition, pages
Dresden: Germany , 2008.
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-44822Local ID: 77764OAI: diva2:265684
Invited talkAvailable from: 2009-10-10 Created: 2009-10-10

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Mikhaylushkin, Arkady
By organisation
The Institute of TechnologyTheoretical Physics
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 27 hits
ReferencesLink to record
Permanent link

Direct link