Wilson Crichton

Seismic Velocity of Chlorite Under High Pressure and Temperature and Implications for the Lesser Antilles Subduction Zone

Nicholas Backhouse, Andrew R. Thomson, John P. Brodholt, Rostislav Hrubiak et autres

Abstract Chlorite is thought to be one of the major water‐carrying phases in subduction zones, both within the slab and in the mantle wedge. Its presence has previously been linked to common seismological observations at subduction zones, including P and S wave …

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Why Diamondoid Nanodiamond Precursors Lose Their Defect Blueprint under HPHT Conditions: A Graphitic Conversion Pathway

Xin Yang, Christopher P. Ender, Qi Lu, András Kovács et autres

Nanodiamonds hosting nitrogen-vacancy centres have emerged as promising quantum sensors, motivating bottom-up strategies that encode particle size and defect architecture through molecular precursor design. Nitrogen-substituted diamondoids have been proposed as atomically defined seeds for nanodiamond growth under high-pressure, high-temperature conditions, but the …

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Behaviour of Cu-H system at moderate pressures

Wilson Crichton, Logan J. Leinbach

We will prepare various hydrides of copper at pressures up to 20 GPa and transform between them.

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ANR Na,Si system

Wilson Crichton, Dario Florio, Jérôme Rouquette, Romain Viennois

We continue our exploration of the system, to NaSi6, NaSi2 and Na2Si compositions.

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Development of a rejection system for very large 2D applications

Wilson Crichton

We have, in recent years, been investigating the possibilities for background rejection and diffracting-volume limited scattering for very large diffractometers. Many such systems exist for x-ray setups; e.g. conical slits for EDX, or ADX collection, or multichannel collimators. These are not, however, …

High-pressure and high-temperature polymorphism of Na 2 CO 3 up to 10 GPa

Benedetta Chrappan Soldavini, Marco Merlini, Chiara Mangano, Davide Comboni et autres

We report two new high-pressure polymorphs of sodium carbonate, ɛ and ɛ-II, stable over ∼2 GPa and 11 GPa, respectively. The ɛ polymorph exhibits a doubling of the c unit-cell parameter relative to the γ and β phases, crystallizes in space group …

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ANR Openbar

Wilson Crichton, Dario Florio, Leon Schutte, Romain Viennois

Syntheses in Na-Si as part of ANR Openbar

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In situ synthesis of new catalytic materials under high pressure

Natalia Trespalacios Villalobos, Martin Demoucron, Amandine Séné, Baron, Marzena, Anna et autres

International audience