High-Pressure Elasticity of Iron and Anisotropy of Earth's Inner Core

Science ◽  
1995 ◽  
Vol 267 (5206) ◽  
pp. 1972-1975 ◽  
Author(s):  
L. Stixrude ◽  
R. E. Cohen
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Earth’S Inner Core

scholarly journals Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys

2010 ◽  
Vol 295 (1-2) ◽  
pp. 292-296 ◽  
Author(s):  
Daniele Antonangeli ◽  
Julien Siebert ◽  
James Badro ◽  
Daniel L. Farber ◽  
Guillaume Fiquet ◽  
...  
Keyword(s):  
High Pressure ◽  
Sound Velocity ◽  
Inner Core ◽  
Velocity Measurements ◽  
Earth’S Inner Core

scholarly journals Sound velocity in iron carbide (Fe3C) at high pressure: Implications for the carbon content of the Earth's inner core

2009 ◽  
Vol 172 (1-2) ◽  
pp. 125-129 ◽  
Author(s):  
Guillaume Fiquet ◽  
James Badro ◽  
Eugene Gregoryanz ◽  
Yingwei Fei ◽  
Florent Occelli
Keyword(s):  
High Pressure ◽  
Carbon Content ◽  
Sound Velocity ◽  
Inner Core ◽  
Iron Carbide ◽  
Earth’S Inner Core

scholarly journals Sound velocities and density measurements of solid hcp-Fe and hcp-Fe–Si (9 wt.%) alloy at high pressure: Constraints on the Si abundance in the Earth's inner core

2018 ◽  
Vol 482 ◽  
pp. 446-453 ◽  
Author(s):  
Daniele Antonangeli ◽  
Guillaume Morard ◽  
Luigi Paolasini ◽  
Gaston Garbarino ◽  
Caitlin A. Murphy ◽  
...  
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Density Measurements ◽  
Earth’S Inner Core ◽  
Sound Velocities

scholarly journals Earth’s Core Is in the Hot Seat

Eos ◽  
2020 ◽  
Vol 101 ◽  
Author(s):  
Jenessa Duncombe
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Inner Core ◽  
Earth’S Core ◽  
Earth's Core ◽  
Earth’S Inner Core

How old is Earth’s inner core? High-pressure and high-temperature experiments suggest that our planet’s inner furnace may be much younger than expected.

scholarly journals High-pressure behavior of the Fe–S system and composition of the Earth's inner core

2017 ◽  
Vol 60 (10) ◽  
pp. 1025-1032 ◽  
Author(s):  
Z G Bazhanova ◽  
V V Roizen ◽  
A R Oganov
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Pressure Behavior ◽  
Earth’S Inner Core

scholarly journals High‐Pressure Deformation of Iron–Nickel–Silicon Alloys and Implications for Earth’s Inner Core

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Matthew C. Brennan ◽  
Rebecca A. Fischer ◽  
Samantha Couper ◽  
Lowell Miyagi ◽  
Daniele Antonangeli ◽  
...  
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Silicon Alloys ◽  
Iron Nickel ◽  
Earth’S Inner Core ◽  
Nickel Silicon

Iron–magnesium compounds under high pressure

2019 ◽  
Vol 43 (44) ◽  
pp. 17403-17407
Author(s):  
Pengyue Gao ◽  
Chuanxun Su ◽  
Sen Shao ◽  
Sheng Wang ◽  
Peng Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Light Element ◽  
Magnesium Compounds ◽  
Earth’S Inner Core

A dynamically and thermodynamically stable Fe-rich compound, Fe2Mg, reveals that Mg may be a light element candidate in the earth's inner core.

High-pressure phase transitions and equations of state in NiSi. I.Ab initiosimulations

2012 ◽  
Vol 45 (2) ◽  
pp. 186-196 ◽  
Author(s):  
Lidunka Vočadlo ◽  
Ian G. Wood ◽  
David P. Dobson
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
Inner Core ◽  
Equations Of State ◽  
Nickel Content ◽  
Stable Phase ◽  
First Principles Calculations ◽  
Cscl Structure ◽  
Earth’S Inner Core ◽  
Pressure Phase

First-principles calculations have been used to determine the equation of state and structural properties of NiSi up to pressures equivalent to that in the Earth's inner core. At atmospheric pressure, the thermodynamically stable phase is that with the MnP structure (as found experimentally). At high pressures, NiSi shows phase transformations to a number of high-pressure polymorphs. For pressures greater than ∼250 GPa, the thermodynamically stable phase of NiSi is that with the CsCl structure, which persists to the highest pressures simulated (∼500 GPa). At the pressures of the Earth's inner core, therefore, NiSi and FeSi will be isostructural and thus are likely to form a solid solution. The density contrast between NiSi and FeSi at inner-core pressures is ∼6%, with NiSi being the denser phase. Therefore, if a CsCl-structured (Fe,Ni)Si alloy were present in the inner core, its density (for the commonly assumed nickel content) might be expected to be ∼1% greater than that of pure FeSi.

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