Iron-Nickel alloy in the Earth's core

Details Iron-Nickel alloy in the Earth's core Iron-Nickel alloy in the Earth's core

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j.109l&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 10, pp. 109-1, CiteID 1471, DOI 10.1029/2002GL015089

Physics

7

Geochemistry: Composition Of The Core, Mineralogy, Petrology, And Mineral Physics: Experimental Mineralogy And Petrology, Mineral Physics: High-Pressure Behavior, Mineral Physics: X Ray, Neutron, And Electron Spectroscopy And Diffraction

Scientific paper

The phase relations of an Fe10wt%Ni alloy were investigated in a diamond anvil cell up to 86 GPa and 2382 K. Adding nickel into iron stabilizes the fcc phase to higher pressures and lower temperatures compared to pure iron, and a region of two-phase coexistence between fcc and hcp phases is observed. Iron with up to 10 wt% nickel is likely to be in the hcp structure under inner core conditions. The axial ratio (c/a) of hcp-Fe10wt%Ni has a weak pressure dependence, but it increases substantially with increasing temperature. The extrapolated c/a ratio at ~5700 K and ~86 GPa is approximately 1.64, lower than a theoretically predicted value of nearly 1.7 for hcp-Fe at 5700 K and inner-core pressure. A lower c/a ratio should have an effect on the longitudinal anisotropy of the hcp phase, and hence, may influence the interpretation of the seismic wave anisotropy of the inner core.

Affiliated with

Also associated with

No associations

Rating

Iron-Nickel alloy in the Earth's core does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Iron-Nickel alloy in the Earth's core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron-Nickel alloy in the Earth's core will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1517720