Olivier Mathon
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View article: Discovering the dual degradation pathway of emerald green in oil paints: The effects of light and humidity
Discovering the dual degradation pathway of emerald green in oil paints: The effects of light and humidity Open
Emerald green, a copper acetoarsenite pigment, enriched the 19th-century and 20th-century artists’ palettes and caused darkening and fragilities in paintings. The accepted alteration mechanism involves the oxidation of triarsenite ions [(A…
View article: Structural Form of Yttrium in Nanocrystalline Fluorapatite from Marine Sediments at 0.11 Å Resolution
Structural Form of Yttrium in Nanocrystalline Fluorapatite from Marine Sediments at 0.11 Å Resolution Open
Deep-sea mud is rich in rare earth elements and yttrium (REY), with yttrium (Y) exhibiting the highest concentration. REY are found in authigenic (a-CFA) and biogenic (b-CFA) carbonate fluorapatite (CFA, Ca5(CO3)
View article: Spatially Resolved In Situ X-ray Absorption Spectroscopy Studies of ZnS Nanoparticle Synthesis at the Water–Toluene Interface
Spatially Resolved In Situ X-ray Absorption Spectroscopy Studies of ZnS Nanoparticle Synthesis at the Water–Toluene Interface Open
Two-phase synthesis is a well-established approach for achieving precise control of the nanoparticle properties. However, studying and understanding chemical transformations in such a spatially heterogeneous system is challenging. In this …
View article: Absence of higher than 6-fold coordination in glassy $GeO_{2}$ up to 158 GPa revealed by X-ray absorption spectroscopy
Absence of higher than 6-fold coordination in glassy $GeO_{2}$ up to 158 GPa revealed by X-ray absorption spectroscopy Open
Simple binary oxide glasses can exhibit a compression behavior distinct from that of their crystalline counterparts. In this study, we employed high-pressure X-ray absorption spectroscopy coupled to the diamond anvil cell to investigate in…
View article: Cation‐Site Disordered Cu <sub>3</sub> PdN Nanoparticles for Hydrogen Evolution Electrocatalysis
Cation‐Site Disordered Cu <sub>3</sub> PdN Nanoparticles for Hydrogen Evolution Electrocatalysis Open
Transition metal nitrides (TMNs) are emerging as a promising class of materials for application in optoelectronics as well as energy conversion and storage, but they remain rather unexplored, mainly due to a lack of mechanistic understandi…
View article: Isotopically heavy molybdenum burial in oxic pelagic sediments and implications for paleo-redox reconstruction
Isotopically heavy molybdenum burial in oxic pelagic sediments and implications for paleo-redox reconstruction Open
View article: Cerium occurs as cerium-phosphate clusters around bioapatite nanocrystals in deep-sea sediments
Cerium occurs as cerium-phosphate clusters around bioapatite nanocrystals in deep-sea sediments Open
View article: In-situ modeling of an FeBYNb metallic glass revealing the Invar effect
In-situ modeling of an FeBYNb metallic glass revealing the Invar effect Open
View article: Dissolution of rare earth elements: Exploring the ability of deep eutectic solvents and organic acid solutions, the case of lactic acid
Dissolution of rare earth elements: Exploring the ability of deep eutectic solvents and organic acid solutions, the case of lactic acid Open
International audience
View article: Fe<sup>3+</sup>∕ΣFe variation in lawsonite and epidote in subducted oceanic crust
Fe<sup>3+</sup>∕ΣFe variation in lawsonite and epidote in subducted oceanic crust Open
The hydrous Ca–Al silicates lawsonite and epidote group minerals (EGMs) are key phases in subduction-zone H2O and element cycling. In high-pressure–low-temperature metamorphic rocks, Fe in both minerals is typically assumed to be entirely …
View article: Unveiling temperature and phase boundaries in laser-driven shocked and released copper: insights from ultra-fast X-ray Absorption Spectroscopy up to 300 GPa
Unveiling temperature and phase boundaries in laser-driven shocked and released copper: insights from ultra-fast X-ray Absorption Spectroscopy up to 300 GPa Open
Cu is an ubiquitous material used in industry for its great thermal and electrical properties. Studying the high-pressure high temperature properties of copper (Cu) is relevant for nuclear fusion research as projectiles and flyers used in …
View article: Exploring a Route to Induce Ferromagnetism on Sr3sn2o7 by Non-Jahn-Teller-Distorted Mn3+ Cations
Exploring a Route to Induce Ferromagnetism on Sr3sn2o7 by Non-Jahn-Teller-Distorted Mn3+ Cations Open
View article: Local electronic properties of La3Ni2O7 under pressure
Local electronic properties of La3Ni2O7 under pressure Open
The recent discovery of superconductivity in $\rm La_3Ni_2O_7$ has attracted significant attention due to its high critical temperature and analogy to cuprate oxides. The oxidation and spin states of Ni ions are among the most important lo…
View article: Cation-site Disordered Cu3PdN Nanoparticles for Hydrogen Evolution Electrocatalysis
Cation-site Disordered Cu3PdN Nanoparticles for Hydrogen Evolution Electrocatalysis Open
Transition metal nitrides (TMNs) are emerging as a promising class of materials for application in optoelectronics as well as energy conversion and storage, but they remain rather unexplored, mainly due to a lack of mechanistic understandi…
View article: Displacive Jahn–Teller Transition in NaNiO<sub>2</sub>
Displacive Jahn–Teller Transition in NaNiO<sub>2</sub> Open
Below its Jahn-Teller transition temperature, TJT, NaNiO2 has a monoclinic layered structure consisting of alternating layers of edge-sharing NaO6 and Jahn-Teller-distorted NiO6 octahedra.…
View article: Mechanism Behind the Enhanced Ferromagnetic Contributions Upon Ru Substitution in Ca<sub>3</sub>Mn<sub>2</sub>O<sub>7</sub> from X-Ray Absorption Spectroscopies
Mechanism Behind the Enhanced Ferromagnetic Contributions Upon Ru Substitution in Ca<sub>3</sub>Mn<sub>2</sub>O<sub>7</sub> from X-Ray Absorption Spectroscopies Open
We have studied the local structure and electronic and magnetic properties of hybrid improper ferroelectric Ca3Mn2O7 upon Ru substitution at the Mn site by a combination of atomic-selective X-ray absorption…
View article: Displacive Jahn--Teller transition in NaNiO$_2$
Displacive Jahn--Teller transition in NaNiO$_2$ Open
Below its Jahn--Teller transition temperature, $T_\mathrm{JT}$, NaNiO$_2$ has a monoclinic layered structure consisting of alternating layers of edge-sharing NaO$_6$ and Jahn-Teller-distorted NiO$_6$ octahedra. Above $T_\mathrm{JT}$ where …
View article: <i>DFT2FEFFIT</i> : a density-functional-theory-based structural toolkit to analyze EXAFS spectra
<i>DFT2FEFFIT</i> : a density-functional-theory-based structural toolkit to analyze EXAFS spectra Open
This article presents a Python-based program, DFT2FEFFIT , to regress theoretical extended X-ray absorption fine structure (EXAFS) spectra calculated from density functional theory structure models against experimental EXAFS spectra. To sh…
View article: The thermal equation of state of xenon: Implications for noble gas incorporation in serpentine minerals and their transport to depth
The thermal equation of state of xenon: Implications for noble gas incorporation in serpentine minerals and their transport to depth Open
International audience
View article: Temperature and pressure dependencies of Sm valence in SmB<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si6.svg" display="inline" id="d1e191"><mml:msub><mml:mrow/><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:math> Kondo insulator probed by x-ray absorption spectroscopy
Temperature and pressure dependencies of Sm valence in SmB Kondo insulator probed by x-ray absorption spectroscopy Open
International audience
View article: Structural and electronic transformations of GeSe <sub>2</sub> glass under high pressures studied by X-ray absorption spectroscopy
Structural and electronic transformations of GeSe <sub>2</sub> glass under high pressures studied by X-ray absorption spectroscopy Open
Pressure-induced transformations in an archetypal chalcogenide glass (GeSe 2 ) have been investigated up to 157 GPa by X-ray absorption spectroscopy (XAS) and molecular dynamics (MD) simulations. Ge and Se K-edge XAS data allowed simultane…
View article: Field-induced magnetic transitions in the highly anisotropic ferrimagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>ErFe</mml:mtext><mml:mn>5</mml:mn></mml:msub><mml:msub><mml:mtext>Al</mml:mtext><mml:mn>7</mml:mn></mml:msub></mml:mrow></mml:math> studied by high-field x-ray magnetic dichroism
Field-induced magnetic transitions in the highly anisotropic ferrimagnet studied by high-field x-ray magnetic dichroism Open
International audience
View article: Adapting the European Synchrotron to Industry
Adapting the European Synchrotron to Industry Open
International audience
View article: Revealing the Incorporation of Cerium in Fluorapatite
Revealing the Incorporation of Cerium in Fluorapatite Open
International audience
View article: Mapping Pressure- and Temperature-Induced Structural and Magnetic Transitions in Perovskite PrNiO<sub>3</sub> with Local and Long-Range Probes
Mapping Pressure- and Temperature-Induced Structural and Magnetic Transitions in Perovskite PrNiO<sub>3</sub> with Local and Long-Range Probes Open
The RNiO3 nickelate perovskites represent a promising class of materials for spintronics applications such as in modern communication devices. This is related to the large diversity of properties shown by these compounds. Indeed, depending…
View article: Interplay of Chemical, Electronic, and Structural Effects in the Triple-Conducting BaFeO<sub>3</sub>–Ba(Zr,Y)O<sub>3</sub> Solid Solution
Interplay of Chemical, Electronic, and Structural Effects in the Triple-Conducting BaFeO<sub>3</sub>–Ba(Zr,Y)O<sub>3</sub> Solid Solution Open
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View article: Elucidating the reaction mechanism of SO2 with Cu-CHA catalysts for NH3-SCR by X-ray absorption spectroscopy
Elucidating the reaction mechanism of SO2 with Cu-CHA catalysts for NH3-SCR by X-ray absorption spectroscopy Open
Dataset related to the article with the same title and authors: https://pubs.rsc.org/en/content/articlelanding/2023/SC/D3SC03924B#fn1 dat files corresponding to the spectra reported in the article. See the article for the description of th…
View article: Elucidating the reaction mechanism of SO2 with Cu-CHA catalysts for NH3-SCR by X-ray absorption spectroscopy
Elucidating the reaction mechanism of SO2 with Cu-CHA catalysts for NH3-SCR by X-ray absorption spectroscopy Open
Dataset related to the article with the same title and authors: https://pubs.rsc.org/en/content/articlelanding/2023/SC/D3SC03924B#fn1 dat files corresponding to the spectra reported in the article. See the article for the description of th…
View article: Mechanisms leading to exceptional niobium concentration during lateritic weathering: The key role of secondary oxides
Mechanisms leading to exceptional niobium concentration during lateritic weathering: The key role of secondary oxides Open
View article: Mechanisms leading to exceptional niobium concentration during lateritic weathering: the key role of secondary oxides
Mechanisms leading to exceptional niobium concentration during lateritic weathering: the key role of secondary oxides Open
This dataset supports the publication entitled: 'Mechanisms leading to exceptional niobium concentration during lateritic weathering: the key role of secondary oxides' submitted to Chemical Geology journal. Data include: - EPMA da…