A5063328995- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Astro and Planetary Science
- earthquake and tectonic studies
- Planetary Science and Exploration
- X-ray Diffraction in Crystallography
- Metallurgical Processes and Thermodynamics
- Diamond and Carbon-based Materials Research
- Hydrocarbon exploration and reservoir analysis
- Laser Material Processing Techniques
- Catalysis and Hydrodesulfurization Studies
- Laser-Plasma Interactions and Diagnostics
- Metal Extraction and Bioleaching
- Catalytic Processes in Materials Science
- Crystal Structures and Properties
- Metallurgy and Cultural Artifacts
- Seismic Imaging and Inversion Techniques
- Solidification and crystal growth phenomena
- Spacecraft and Cryogenic Technologies
- Mineral Processing and Grinding
- Ion-surface interactions and analysis
- Atomic and Subatomic Physics Research
- Crystallography and molecular interactions
- Crystallization and Solubility Studies
- Glass properties and applications
Planetary Science Institute
2020-2025
Harvard University
2020-2025
Institut de minéralogie, de physique des matériaux et de cosmochimie
2017-2024
Applied Energetics (United States)
2021-2024
Harvard University Press
2020-2024
University of Rochester
2024
Energetics (United States)
2024
Sorbonne Université
2017
Core segregation and atmosphere formation are two of the major processes that redistribute volatile elements-hydrogen (H), carbon (C), nitrogen (N), sulfur (S)-in around rocky planets during their formation. The elements by definition accumulate in gaseous reservoirs form atmospheres. However, under conditions early planet formation, these can also behave as siderophiles (i.e., iron-loving) become concentrated core-forming metals. Current models core suggest metal-silicate reactions occurred...
We combined recent experimental data with analytical models to investigate the evolution of Grüneisen parameter (γ) for iron under conditions relevant cores rocky planets ranging from 1 5 Earth masses. γ relates thermal and elastic properties materials is a critical factor understanding dynamic behavior planetary interiors. Previous sound speed measurements at Earth's core conditions, seismic velocity data, significantly enhanced our planet's interior [1]....
Abstract Highly siderophile elements (HSE), including platinum, provide powerful geochemical tools for studying planet formation. Late accretion of chondritic components to Earth after core formation has been invoked as the main source mantle HSE. However, could also have contributed mantle’s HSE content. Here we present measurements platinum metal-silicate partitioning coefficients, obtained from laser-heated diamond anvil cell experiments, which demonstrate that into metal is lower at high...
Theory and experiments show that, with increasing pressure, the chemical bonds of methane rearrange, leading to formation complex polymers then dissociation. However, there is disagreement on exact conditions where these changes take place. In this study, samples were precompressed in diamond-anvil cells shock compressed pressures reaching 400 GPa, highest yet explored methane. The results reveal a qualitative change Hugoniot curve at 80–150 which interpreted as signature dissociation based...
Constraining the melting behavior of magnesium oxide, a major constituent gaseous and rocky planets, is key to benchmarking their evolutionary models. Using double-shock technique, we extended MgO melt curve measurements 2 TPa; this twice pressure achieved by previous experiments on any material. A temperature plateau observed between 1218 1950 GPa in second-shock states, which attributed latent heat melting. At GPa, measured 17 600 K, 17% lower than recent theoretical predictions. The...
Abstract Nitrogen, the most abundant element in Earth's atmosphere, is also a primary component of solid nitride minerals found meteorites and on surface. If they remain stable to high pressures temperatures, these nitrides may be important reservoirs nitrogen planetary interiors. We used synchrotron X‐ray diffraction measure thermal equation state phase stability titanium (TiN) laser‐heated diamond anvil cell at up ∼70 GPa temperatures ∼2,500 K. TiN maintains cubic B1 (NaCl‐type) crystal...
The warm dense matter regime is generally found in materials compressed to several times their densities on the Earth's surface at temperatures hot enough produce a conducting fluid, but not so that cohesive binding overwhelmed by temperature. This region of phase space notoriously difficult constrain with theoretical models. Iron most stable element, and relevant astrophysics, planetary physics, industry. paper here describes experiments using giant kilojoule lasers shock compress iron...
Abstract During their formation, terrestrial planets underwent a magma ocean phase during which metallic cores segregated from silicate mantles and early atmospheres formed. These planetary formation processes resulted in redistribution of the abundances highly volatile elements (HVEs, such as H, C, N, S) between planets’ cores, mantles, atmospheres. This review presents numerous experimental techniques used to simulate conditions identify parameters that influenced behavior HVEs formation....
The high-pressure temperature phase diagram and transport properties of materials are broad interest to planetary sciences high-energy-density applications. Alumina $({\mathrm{Al}}_{2}{\mathrm{O}}_{3})$ or its various forms (e.g., solutions with other oxides silicates) important constituents in Earth's super-Earths' mantles, common window dynamic compression experiments, standard pressure calibrators diamond-anvil-cell experiments. Its structures particular importance but have not been well...