Phase relations of Fe-Si alloy in Earth's core

Details Phase relations of Fe-Si alloy in Earth's core Phase relations of Fe-Si alloy in Earth's core

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3606306l&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 6, CiteID L06306

Physics

4

Mineral Physics: High-Pressure Behavior, Mineral Physics: X-Ray, Neutron, And Electron Spectroscopy And Diffraction, Mineral Physics: Equations Of State, Mineral Physics: Creep And Deformation, Mineral Physics: General Or Miscellaneous

Scientific paper

Phase relations of an Fe0.85Si0.15 alloy were investigated up to 240 GPa and 3000 K using in situ X-ray diffraction in a laser-heated diamond anvil cell. An alloy of this composition as starting material is found to result in a stabilized mixture of Si-rich bcc and Si-poor hcp Fe-Si phases up to at least 150 GPa and 3000 K, whereas only hcp-Fe0.85Si0.15 is found to be stable between approximately 170 GPa and 240 GPa at high temperatures. Our extended results indicate that Fe0.85Si0.15 alloy is likely to have the hcp structure in the inner core, instead of the previously proposed mixture of hcp and bcc phases. Due to the volumetric dominance of the hcp phase in the hcp + bcc coexistence region close to the outer-core conditions, the dense closest-packed Fe-Si liquid is more relevant to understanding the properties of the outer core.

Affiliated with

Also associated with

No associations

Rating

Phase relations of Fe-Si alloy in 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 Phase relations of Fe-Si alloy in Earth's core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase relations of Fe-Si alloy in Earth's core will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-976468