Publications de Philippe Gillet

Pinpointing the thermal history of lunar basaltic meteorites in a nutshell

Cyril Cayron, Arthur Brian Aebersold, Philippe Gillet, Rongrong Cai

Native metals of igneous origin are recognized as one of the distinctive features of basalts from the Moon. Our study demonstrates that the tiny Fe-Ni metal blebs nucleated from lunar magma exhibit unanticipated, nutshell-like, crystallographic microstruct ...

Springer Science and Business Media LLC2025

Composition and Pressure Effects on Partitioning of Ferrous Iron in Iron-Rich Lower Mantle Heterogeneities

Marco Cantoni, Philippe Gillet, Farhang Nabiei, Susannah McGregor Dorfman, James Badro, Charles-Edouard Boukaré

Both seismic observations of dense low shear velocity regions and models of magma ocean crystallization and mantle dynamics support enrichment of iron in Earth’s lowermost mantle. Physical properties of iron-rich lower mantle heterogeneities in the modern ...

2021

Investigating Magma Ocean Solidification on Earth Through Laser‐Heated Diamond Anvil Cell Experiments

Marco Cantoni, Cécile Hébert, Philippe Gillet, Farhang Nabiei, James Badro, Charles-Edouard Boukaré

We carried out a series of silicate fractional crystallization experiments at lower mantle pressures using the laser-heated diamond anvil cell. Phase relations and the compositional evolution of the cotectic melt and equilibrium solids along the liquid lin ...

2021

Effects of composition and pressure on electronic states of iron in bridgmanite

Arnaud Magrez, Philippe Gillet, Susannah McGregor Dorfman

Electronic states of iron in the lower mantle's dominant mineral, (Mg,Fe,Al)(Fe,Al,Si)O-3 bridgmanite, control physical properties of the mantle including density, elasticity, and electrical and thermal conductivity. However, the determination of electroni ...

MINERALOGICAL SOC AMER2020

Observation of methane filled hexagonal ice stable up to 150 GPa

Richard Gaal, Philippe Gillet, Livia Eleonora Bove Kado, Umbertoluca Ranieri

Gas hydrates consist of hydrogen-bonded water frameworks enclosing guest gas molecules and have been the focus of intense research for almost 40 y, both for their fundamental role in the understanding of hydrophobic interactions and for gas storage and ene ...

National Academy of Sciences2019

Quantum Dynamics of H-2 and D-2 Confined in Hydrate Structures as a Function of Pressure and Temperature

Richard Gaal, Philippe Gillet, Livia Eleonora Bove Kado, Umbertoluca Ranieri

We present an extensive study of the quantum dynamics of molecular hydrogen trapped within the nanocavities of two hydrate structures at low temperatures, namely, clathrate structure II and filled ice structure Cl. By inelastic neutron scattering measureme ...

AMER CHEMICAL SOC2019

Carbonate stability in the reduced lower mantle

Marco Cantoni, Philippe Gillet, Farhang Nabiei, Susannah McGregor Dorfman, James Badro

2018

Orientational Ordering, Locking-in, and Distortion of CH4 Molecules in Methane Hydrate III under High Pressure

Richard Gaal, Philippe Gillet, Livia Eleonora Bove Kado, Umbertoluca Ranieri

2018

A large planetary body inferred from diamond inclusions in a ureilite meteorite

Marco Cantoni, Cécile Hébert, Emad Oveisi, Philippe Gillet, Farhang Nabiei, James Badro, Teresa Katharina Dennenwaldt

Planetary formation models show that terrestrial planets are formed by the accretion of tens of Moon-to Mars-sized planetary embryos through energetic giant impacts. However, relics of these large proto-planets are yet to be found. Ureilites are one of the ...

Nature Research2018

Highly Oriented Atomically Thin Ambipolar MoSe2

Andras Kis, Oleg Yazyev, Alessandro Surrente, Philippe Gillet, Oriol López Sánchez, Ming-Wei Chen, Dmitry Ovchinnikov, Michele Pizzochero

Transition metal dichalcogenides (TMDCs), together with other two-dimensional (2D) materials, have attracted great interest due to the unique optical and electrical properties of atomically thin layers. In order to fulfill their potential, developing large ...

American Chemical Society2017

Spin and valence dependence of iron partitioning in Earth's deep mantle

Marco Cantoni, Cécile Hébert, Philippe Gillet, Farhang Nabiei, James Badro, Hélène Marie Piet, Teresa Katharina Dennenwaldt

We performed laser-heated diamond anvil cell experiments combined with state-of-the-art electron microanalysis (focused ion beam and aberration-corrected transmission electron microscopy) to study the distribution and valence of iron in Earth's lower mantl ...

National Academy of Sciences2016

Phase transition processes of olivine in the shocked Martian meteorite Tissint: Clues to origin of ringwoodite-, bridgmanite- and magnesiowilstite-bearing assemblages

Philippe Gillet

Tissint is a heavily shocked olivine-phyric shergottite. We investigated and documented several phase transformations and dissociation phenomena of olivine adjacent to and in many shock-induced melt-pockets of Tissint. Olivine grains entrained in the melt- ...

Elsevier2016

Metal Nodules In El3 And Eh3 Primitive Chondrites: Conglomerates Of Micro Pebble Metals With A Menagerie Of Sulfide Assemblages; Graphite Feathers And Various Sinoite Morphologies, Metal Clasts. No Evidence For Melting

Yu Lin, Philippe Gillet

Wiley-Blackwell2016

Stress-state manipulation in fused silica via femtosecond laser irradiation

Yves Bellouard, Philippe Gillet, Charles Michel Henri Pépin, Ya Cheng

Controlling the stress in glass after laser exposure is of prime importance not only for photonics applications, but also for preserving the mechanical integrity of glass components in general. The sub-surface exposure of fused silica to femtosecond laser ...

Optical Soc Amer2016

Electronic transitions of iron in almandine-composition glass to 91 GPa

Philippe Gillet, Susannah McGregor Dorfman

Valence and spin states of Fe were investigated in a glass of almandine (Fe3Al2Si3O12) composition to 91 GPa by X-ray emission spectroscopy and energy- and time-domain synchrotron Mossbauer spectroscopy in the diamond-anvil cell. Changes in optical propert ...

Mineralogical Soc Amer2016

Dynamical Crossover in Hot Dense Water: The Hydrogen Bond Role

Philippe Gillet, Livia Eleonora Bove Kado, Umbertoluca Ranieri

We investigate the terahertz dynamics of liquid H2O as a function of pressure along the 450 K isotherm, by coupled quasielastic neutron scattering and inelastic X-ray scattering experiments. The pressure dependence of the single molecule dynamics is anomal ...

Amer Chemical Soc2016

Evidence from Tm anomalies for non-CI refractory lithophile element proportions in terrestrial planets and achondrites

Philippe Gillet

Thulium is a heavy rare earth element (REE) whose geochemical behavior is intermediate between Er and Yb, and that is not expected to be decoupled from these elements during accretion of planetary bodies and geological processes. However, irregularities in ...

Pergamon-Elsevier Science Ltd2016

Large-Area Epitaxial Monolayer MoS2

Andras Kis, Aleksandra Radenovic, Anna Fontcuberta i Morral, Philippe Gillet, Nicola Marzari, Simone Bertolazzi, Oriol López Sánchez, Daria Krasnozhon, Ming-Wei Chen, Dmitry Ovchinnikov, Marco Gibertini, Dumitru Dumcenco, Yen-Cheng Kung, Kolyo Marinov

Two-dimensional semiconductors such as MoS2 are an emerging material family with wide-ranging potential applications in electronics, optoelectronics, and energy harvesting. Large-area growth methods are needed to open the way to applications. Control over ...

Amer Chemical Soc2015

Large-area MoS2 grown using H2S as the sulphur source

Andras Kis, Aleksandra Radenovic, Duncan Thomas Lindsay Alexander, Philippe Gillet, Oriol López Sánchez, Dmitry Ovchinnikov, Dumitru Dumcenco

We report on the growth of molybdenum disulphide (MoS2) using H2S as a gas-phase sulfur precursor that allows controlling the domain growth direction of domains in both vertical (perpendicular to the substrate plane) and horizontal (within the substrate pl ...

2015

Unique large diamonds in a ureilite from Almahata Sitta 2008 TC3 asteroid

Philippe Gillet

The Almahata Sitta MS-170 ureilite (a piece of a breccia originating from the asteroid, 2008 TC3) consists mainly of olivine, with many diamond and graphite grains existing between the olivine grains. The occurrences of the diamonds are unique; i.e., (i) s ...

Pergamon-Elsevier Science Ltd2015