DOI: 10.1002/grl.50946
论文题名: Decomposition of Fe3S above 250 GPa
作者: Ozawa H. ; Hirose K. ; Suzuki T. ; Ohishi Y. ; Hirao N.
刊名: Geophysical Research Letters
ISSN: 0094-8564
EISSN: 1944-8295
出版年: 2013
卷: 40, 期: 18 起始页码: 4845
结束页码: 4849
语种: 英语
英文关键词: high pressure
; inner core
; light element
Scopus关键词: Hexagonal close-packed
; High pressure
; High pressure and high temperature
; Inner core
; Laser-heated diamond-anvil cell
; Light elements
; Scanning transmission electron microscopes
; Subsolidus phase relations
; Chemical elements
; Transmission electron microscopy
; X ray diffraction
; Chemical analysis
; data set
; decomposition
; high pressure
; high temperature
; light effect
; sulfide
; X-ray diffraction
英文摘要: We have determined subsolidus phase relations in the Fe-FeS system up to 271 GPa using laser-heated diamond-anvil cell techniques. In situ synchrotron X-ray diffraction (XRD) measurements performed at high pressure and high temperature demonstrate the coexistence of hexagonal close-packed (hcp) Fe and tetragonal Fe3S up to 241 GPa and 2510 K. In contrast, the XRD data obtained above 250 GPa show that the hcp phase coexists with the CsCl (B2)-type phase for three different Fe-S bulk compositions (10, 16, and 20 atm% S). Furthermore, chemical analyses using a scanning transmission electron microscope on a retrieved sample indicate that Fe3S sample decomposes into two phases at 271 GPa and 2530 K, consistent with the XRD data. Theory predicts the presence of extensive solid solution between Fe and FeS at inner core conditions, whereas our results suggest that the Fe-FeS system remains eutectic at least to 271 GPa. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884340844&doi=10.1002%2fgrl.50946&partnerID=40&md5=f1931d014e19fbe88e04b640a662f870
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5828
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, Kanagawa, Yokosuka 237-0061, Japan
Recommended Citation:
Ozawa H.,Hirose K.,Suzuki T.,et al. Decomposition of Fe3S above 250 GPa[J]. Geophysical Research Letters,2013-01-01,40(18).