High pressure and high temperature phase transitions of FeO

Details High pressure and high temperature phase transitions of FeO High pressure and high temperature phase transitions of FeO

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pepi..146..273m&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 146, Issue 1-2, p. 273-282.

Physics

14

Scientific paper

We investigated the phase transitions of FeO at high pressure and high temperature up to 87GPa and 1730K by in situ synchrotron X-ray diffraction measurements in a laser-heated diamond anvil cell (DAC). The results demonstrated that the NaCl-type (B1) structure of FeO undergoes transition to the NiAs-type (B8) structure above 70GPa at 1600K. The density increase across this transition is about 2%. Present B1-B8 transition pressure is consistent with the previous shock-induced transition pressure. The relative intensities of diffraction peaks of the B8 phase may suggest a polytype normal/inverse NiAs structure, which has a metallic nature that could promote the oxygen incorporation into the iron-rich core. Transition to the metallic B8 phase above 70GPa is also consistent with the earlier electrical resistance measurements. The hexagonal close-packed (hcp) ɛ-phase of Fe coexisted with FeO both at room temperature and high temperatures above 44-87GPa.

Affiliated with

Also associated with

No associations

Rating

High pressure and high temperature phase transitions of FeO 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 High pressure and high temperature phase transitions of FeO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High pressure and high temperature phase transitions of FeO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1097977