DOI: 10.1002/grl.50588
论文题名: Sound velocities for hexagonally close-packed iron compressed hydrostatically to 136 GPa from phonon density of states
作者: Gleason A.E. ; Mao W.L. ; Zhao J.Y.
刊名: Geophysical Research Letters
ISSN: 0094-8850
EISSN: 1944-8581
出版年: 2013
卷: 40, 期: 12 起始页码: 2983
结束页码: 2987
语种: 英语
英文关键词: hcp-iron
; hydrostatic
; NRIXS
; sound velocity
Scopus关键词: Elasticity measurement
; Equation of state
; hcp-iron
; hydrostatic
; Hydrostatic conditions
; NRIXS
; Phonon density of state
; Resonant inelastic x-ray scattering
; Acoustic wave velocity
; Chemical elements
; Elasticity
; Equations of state
; Hydraulics
; Sandwich structures
; Shear flow
; Shear waves
; Iron
; compression
; elasticity
; equation of state
; hydrostatic pressure
; inner core
; iron
; S-wave
; seismic data
; shear modulus
; sound velocity
英文摘要: The phonon density of states of pure iron (57Fe) was measured under hydrostatic conditions using nuclear resonant inelastic X-ray scattering (NRIXS) at pressures up to 136 GPa. Extracting shear (Vs) and compressional (Vp) wave speeds from the Debye velocity and equation of state, we find the hydrostatic shear wave speed trend above previously collected NRIXS data under nonhydrostatic conditions by roughly 5%-6% in the measured pressure range. Using the Birch Murnaghan finite strain approach to fit pressure-dependent adiabatic bulk and shear moduli, we extrapolated our velocities to inner Earth core densities and found that our shear wave speeds are 3% higher than those in previous studies. Our results on pure iron provide a more accurate and precise baseline to which added complications (e.g., Ni concentration, inclusion of various light elements, and temperature effects) can be considered when comparing experimental elasticity measurements to inner core seismic data. Key Points velocities to inner Earth core densities are more accurate provides a better baseline ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880563465&doi=10.1002%2fgrl.50588&partnerID=40&md5=90a5439b748e2ec649945ad2ac36aee6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6114
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, United States
Recommended Citation:
Gleason A.E.,Mao W.L.,Zhao J.Y.. Sound velocities for hexagonally close-packed iron compressed hydrostatically to 136 GPa from phonon density of states[J]. Geophysical Research Letters,2013-01-01,40(12).