DOI: 10.1002/2014GL061233
论文题名: Liquid iron-sulfur alloys at outer core conditions by first-principles calculations
作者: Umemoto K. ; Hirose K. ; Imada S. ; Nakajima Y. ; Komabayashi T. ; Tsutsui S. ; Baron A.Q.R.
刊名: Geophysical Research Letters
ISSN: 0094-9764
EISSN: 1944-9495
出版年: 2014
卷: 41, 期: 19 起始页码: 6712
结束页码: 6717
语种: 英语
英文关键词: first-principles calculation
; high pressure
; high temperature
; inelastic X-ray scattering
; liquid iron alloy
; outer core
Scopus关键词: Acoustic wave velocity
; Alloys
; Calculations
; Chemical elements
; Iron
; Iron alloys
; Liquid metals
; Sulfur
; X ray scattering
; First-principles calculation
; High pressure
; High temperature
; Inelastic X ray scattering
; Liquid iron
; outer core
; Liquids
; alloy
; Earth structure
; high pressure
; high temperature
; outer core
; sulfur
英文摘要: We perform first-principles calculations to investigate liquid iron-sulfur alloys (Fe, Fe56 S8 , Fe52 S12 , and Fe48 S16 ) under high-pressure and high-temperature (150-300 GPa and 4000-6000 K) conditions corresponding to the Earth's outer core. Considering only the density profile, the best match with the preliminary reference Earth model is by liquid Fe-14 wt % S (Fe50 S14 ), assuming sulfur is the only light element. However, its bulk sound velocity is too high, in particular in the deep outer core, suggesting that another light component such as oxygen is required. An experimental check using inelastic X-ray scattering shows good agreement with the calculations. In addition, a present study demonstrates that the Birch's law does not hold for liquid iron-sulfur alloy, consistent with a previous report on pure liquid iron. Key Points The present paper calculates liquid Fe-S alloy under the outer core conditionsThe density of Fe + 14 wt % S is consistent with that of PREMAnother light element is necessary to account for sound velocity of PREM ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911127407&doi=10.1002%2f2014GL061233&partnerID=40&md5=ad3f7f2e2d57f0decea8df9b00fcbd94
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7028
Appears in Collections: 气候减缓与适应
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作者单位: Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan
Recommended Citation:
Umemoto K.,Hirose K.,Imada S.,et al. Liquid iron-sulfur alloys at outer core conditions by first-principles calculations[J]. Geophysical Research Letters,2014-01-01,41(19).