Eric Edmund

Eric Edmund
Carnegie Institution for Science

PhD

About

7
Publications
1,009
Reads
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66
Citations
Additional affiliations
July 2021 - July 2021
Carnegie Institution for Science
Position
  • PostDoc Position
August 2019 - June 2021
January 2019 - April 2019
Sorbonne Université
Position
  • PostDoc Position
Description
  • Studies of the phase diagram and EoS of Fe-Si and Fe-C alloys.
Education
October 2015 - September 2018
Sorbonne Université
Field of study
  • The Elasticity of Iron Alloys at Extreme Conditions
September 2010 - June 2015
The University of Edinburgh
Field of study
  • Chemical Physics

Publications

Publications (7)
Article
Full-text available
Mercury’s metallic core is expected to have formed under highly reducing conditions, resulting in the presence of significant quantities of silicon alloyed to iron. Here we present the phase diagram of the Fe-FeSi system, reconstructed from in situ X-ray diffraction measurements at pressure and temperature conditions spanning over those expected fo...
Article
Full-text available
We describe here a time resolved pump-probe laser technique—picosecond interferometry—which has been combined with diamond anvil cells (DAC). This method enables the measurement of the longitudinal sound velocity up to Mbar pressure for any kind of material (solids, liquids, metals, insulators). We also provide a description of picosecond acoustics...
Article
Full-text available
Knowledge of the elastic properties and equations of state of iron and iron alloys are of fundamental interest in Earth and planetary sciences as they are the main constituents of telluric planetary cores. Here, we present results of X-ray diffraction measurements on a ternary Fe–Ni–Si alloy with 5 wt% Ni and 5 wt% Si, quasi-hydrostatically compres...
Article
Using a combination of picosecond acoustics and synchrotron X-ray diffraction, the sound velocities and equations of state of Fe-Si alloys have been determined over a wide range of compositions (10-29 at% Si) and pressures (up to 65 GPa) under quasihydrostatic conditions. We observe marked variation in the elastic properties of the alloys depending...
Article
Full-text available
The elasticity of hcp-Fe-5wt%Si has been investigated by synchrotron X-ray diffraction up to 110 GPa and 2,100 K and by picosecond acoustics measurements at ambient temperature up to 115 GPa. The established Pressure-Volume-Temperature equation of state shows that the density of the Earth's inner core can be matched by an Fe-Si alloy with 5wt% Si f...
Article
We carried out sound velocity and density measurements on solid hcp-Fe and an hcp-Fe–Si alloy with 9 wt.% Si at 300 K up to ∼170 and ∼140 GPa, respectively. The results allow us to assess the density (ρ) dependence of the compressional sound velocity (VP) and of the shear sound velocity (VS) for pure Fe and the Fe–Si alloy. The established VP–ρ and...

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Archived project