Computer Science
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010e%26psl.294...94k&link_type=abstract
Earth and Planetary Science Letters, Volume 294, Issue 1-2, p. 94-100.
Computer Science
5
Scientific paper
In situ X-ray diffraction experiments in the Fe-FeS system were performed up to 220 GPa and 3300 K using a laser-heated diamond anvil cell. Fe3S and ɛ-Fe coexisted stably up to 220 GPa and 3300 K, and thus, Fe3S is likely to be the stable S-bearing iron alloy under the Earth's core conditions. The solid iron (ɛ-Fe) also contained 7.6(0.8) at.% of sulfur at 86 GPa and 2200 K. The amount of sulfur in the solid iron increased with increasing pressure at the eutectic temperatures. If the sulfur content obtained in this study is extrapolated to the conditions at the inner core, all the sulfur in the solid inner core can be stored in ɛ-Fe. The eutectic composition becomes nonsensitive to pressure and seems to be constant around 20 at.% of sulfur at pressures above 40 GPa. The pressure gradient of the melting curve of the Fe-FeS system is 13.4(0.7) K/GPa. Based on our results of melting relationship, the temperature at the core-mantle boundary should be greater than 2850(100) K, assuming that sulfur is the only light element in the Earth's liquid outer core.
Hirao Naohisa
Kamada Seiji
Kikegawa Takumi
Kondo Tadashi
Ohishi Yasuo
No associations
LandOfFree
Phase relationships of the Fe-FeS system in conditions up to the Earth's outer 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 relationships of the Fe-FeS system in conditions up to the Earth's outer core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase relationships of the Fe-FeS system in conditions up to the Earth's outer core will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-916173