Lélia Libon
YOU?
Author Swipe
View article: Shock compression of FeOOH and implications for iron-water interactions in super-earth magma oceans
Shock compression of FeOOH and implications for iron-water interactions in super-earth magma oceans Open
Iron(Fe)-water reactions in a magma ocean can influence water storage and density of planets. These reactions can form Fe-O-H phases, whose density, melting, and electronic properties at planetary interior conditions are important for info…
View article: Structural evolution of liquid silicates under conditions in Super-Earth interiors
Structural evolution of liquid silicates under conditions in Super-Earth interiors Open
Molten silicates at depth are crucial for planetary evolution, yet their local structure and physical properties under extreme conditions remain elusive due to experimental challenges. In this study, we utilize in situ X-ray diffraction (X…
View article: Insights on dense silicate melts from shock-compression coupled to in situ X-ray probes
Insights on dense silicate melts from shock-compression coupled to in situ X-ray probes Open
Molten silicates existing at depth play an important role in planetary evolution. Yet, understanding the local structure and properties of liquid silicates under extreme pressure and temperature remains challenging due to the inherent comp…
View article: The high flux nano-X-ray diffraction, fluorescence and imaging beamline ID27 for science under extreme conditions on the ESRF Extremely Brilliant Source
The high flux nano-X-ray diffraction, fluorescence and imaging beamline ID27 for science under extreme conditions on the ESRF Extremely Brilliant Source Open
In this overview article, we present the main features of the upgraded ID27 beamline which is fully optimised to match the exceptional characteristics of the new Extremely Bright Source (EBS) of the European Synchrotron Radiation Facility …
View article: A von Hámos spectrometer for diamond anvil cell experiments at the High Energy Density Instrument of the European X-ray Free-Electron Laser
A von Hámos spectrometer for diamond anvil cell experiments at the High Energy Density Instrument of the European X-ray Free-Electron Laser Open
A von Hámos spectrometer has been implemented in the vacuum interaction chamber 1 of the High Energy Density instrument at the European X-ray Free-Electron Laser facility. This setup is dedicated, but not necessarily limited, to X-ray spec…
View article: High-efficiency X-ray emission spectroscopy of cold-compressed Fe<sub>2</sub>O<sub>3</sub>and laser-heated pressurized FeCO<sub>3</sub>using a von Hámos spectrometer
High-efficiency X-ray emission spectroscopy of cold-compressed Fe<sub>2</sub>O<sub>3</sub>and laser-heated pressurized FeCO<sub>3</sub>using a von Hámos spectrometer Open
Fast and efficient (resonant) X-ray emission spectroscopy setup for the electronic structure at lower mantle conditions: high spin in laser-heated FeCO 3 and a two-step spin transition in pressurized Fe 2 O 3 with increasing valence to cor…
View article: Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures
Structural and electron spin state changes in an x-ray heated iron carbonate system at the Earth's lower mantle pressures Open
Funder: \n Helmholtz-Gemeinschaft\n http://dx.doi.org/10.13039/501100001656
View article: Setup to study the electronic structure of iron-bearing compounds in situ at conditions of the Earth&#8217;s lower mantle&#160;
Setup to study the electronic structure of iron-bearing compounds in situ at conditions of the Earth’s lower mantle  Open
<p>The determination of the electronic structure of iron-bearing compounds at high pressure and high temperature (HPHT) conditions is of crucial importance for the understanding of the Earth&#8217;s interior and planetary matter.…
View article: Sound Velocities in FeSi at Lower Mantle Conditions and the Origin of Ultralow‐Velocity Zones
Sound Velocities in FeSi at Lower Mantle Conditions and the Origin of Ultralow‐Velocity Zones Open
The origin of ultralow‐velocity zones (ULVZs) remains an open question despite recent advances in mineral physics and seismology. Here, we examine the hypothesis that FeSi formed from core‐mantle chemical reactions is a plausible source of…
View article: Reflective imaging, on-axis laser heating and radiospectrometry of samples in diamond anvil cells with a parabolic mirror
Reflective imaging, on-axis laser heating and radiospectrometry of samples in diamond anvil cells with a parabolic mirror Open
We describe the use of a silver-coated 90 degrees parabolic mirror of 33 mm focal length as objective for imaging, on-axis laser heating and radiospectrometric temperature measurements of a sample compressed in a diamond anvil cell in a la…
View article: Carbon in the deep Earth: The fate of magnesite in the lower mantle.
Carbon in the deep Earth: The fate of magnesite in the lower mantle. Open
International audience
View article: Phase stabilities and Fe/Sr/La partitioning between magnesite (MgCO3) and mantle silicates at lower mantle conditions.
Phase stabilities and Fe/Sr/La partitioning between magnesite (MgCO3) and mantle silicates at lower mantle conditions. Open
<p>Carbonates appear to be one group of the main carbon-bearing minerals in the Earth&#8217;s interior. Inclusions of carbonates in diamonds of lower mantle origin support the assumption that they are present even in the Earth&am…
View article: A portable on-axis laser-heating system for near-90° X-ray spectroscopy: application to ferropericlase and iron silicide
A portable on-axis laser-heating system for near-90° X-ray spectroscopy: application to ferropericlase and iron silicide Open
A portable IR fiber laser-heating system, optimized for X-ray emission spectroscopy (XES) and nuclear inelastic scattering (NIS) spectroscopy with signal collection through the radial opening of diamond anvil cells near 90°with respect to …