High-pressure studies with x-rays using diamond anvil cells

G Shen, HK Mao - Reports on progress in Physics, 2016 - iopscience.iop.org
Pressure profoundly alters all states of matter. The symbiotic development of ultrahigh-
pressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; …

Effects of the electronic spin transitions of iron in lower mantle minerals: Implications for deep mantle geophysics and geochemistry

JF Lin, S Speziale, Z Mao… - Reviews of …, 2013 - Wiley Online Library
We have critically reviewed and discussed currently available information regarding the spin
and valence states of iron in lower mantle minerals and the associated effects of the spin …

[HTML][HTML] Core formation, mantle differentiation and core-mantle interaction within Earth and the terrestrial planets

RG Trønnes, MA Baron, KR Eigenmann, MG Guren… - Tectonophysics, 2019 - Elsevier
The terrestrial planets accreted from a diverse suite of solar system materials ranging from
strongly O-deficient materials similar to enstatite chondrites via ordinary chondrite materials …

Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data

A Kurnosov, H Marquardt, DJ Frost, TB Ballaran… - Nature, 2017 - nature.com
The chemical composition of Earth's lower mantle can be constrained by combining
seismological observations with mineral physics elasticity measurements,,. However, the …

Effect of chemistry on the compressibility of silicate perovskite in the lower mantle

TB Ballaran, A Kurnosov, K Glazyrin, DJ Frost… - Earth and Planetary …, 2012 - Elsevier
Three single-crystals of magnesium silicate perovskite with differing chemical compositions
have been studied by means of synchrotron X-ray diffraction in diamond anvil cells with He …

Stability of ferrous-iron-rich bridgmanite under reducing midmantle conditions

SH Shim, B Grocholski, Y Ye, EE Alp… - Proceedings of the …, 2017 - National Acad Sciences
Our current understanding of the electronic state of iron in lower-mantle minerals leads to a
considerable disagreement in bulk sound speed with seismic measurements if the lower …

Experimental evidence for silica-enriched Earth's lower mantle with ferrous iron dominant bridgmanite

I Mashino, M Murakami, N Miyajima… - Proceedings of the …, 2020 - National Acad Sciences
Determination of the chemical composition of the Earth's mantle is of prime importance to
understand the evolution, dynamics, and origin of the Earth. However, there is a lack of …

High‐Pressure Geophysical Properties of Fcc Phase FeHX

EC Thompson, AH Davis, W Bi, J Zhao… - Geochemistry …, 2018 - Wiley Online Library
Face centered cubic (fcc) FeHX was synthesized at pressures of 18–68 GPa and
temperatures exceeding 1,500 K. Thermally quenched samples were evaluated using …

The composition and redox state of bridgmanite in the lower mantle as a function of oxygen fugacity

R Huang, TB Ballaran, CA McCammon… - … et Cosmochimica Acta, 2021 - Elsevier
The chemistry of bridgmanite (Brg), especially the oxidation state of iron, is important for
understanding the physical and chemical properties, as well as putting constraints on the …

Inverse problems in geodynamics using machine learning algorithms

MH Shahnas, DA Yuen… - Journal of Geophysical …, 2018 - Wiley Online Library
During the past few decades numerical studies have been widely employed to explore the
style of circulation and mixing in the mantle of Earth and other planets. However, in …