期刊
EARTH AND PLANETARY SCIENCE LETTERS
卷 313, 期 -, 页码 79-85出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.epsl.2011.11.002
关键词
iron hydride; sound velocity; inelastic X-ray scattering; high pressure; Earth's inner core
资金
- Japan Society for the Promotion of Science
- Ministry of Education, Culture, Science, Sport, and Technology of the Japanese Government [18104009, 22000002]
- Grants-in-Aid for Scientific Research [18104009, 22000002, 09J04077] Funding Source: KAKEN
We have determined the density evolution of the sound velocity of dhcp-FeHx (x approximate to 1) up to 70 GPa at room temperature, by inelastic X-ray scattering and by X-ray diffraction. We find that the variation of V-p with density is different for the ferromagnetic and nonmagnetic dhcp-FeHx, and that only nonmagnetic dhcp-FeHx follows Birch's law. Combining our results with Birch's law for iron and assuming an ideal two-component mixing model, we obtain an upper bound of the hydrogen content in the Earth's inner core, 0.23(6) wt.% H, corresponding to FeH0.13(3). The iron alloy with 0.23(6) wt.% H can satisfy the density, and compressional and shear sound velocities of the PREM inner core, assuming that there are no other light elements in the inner core. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据