6 papers
Novel phases in the Fe-Si-O system at terapascal pressures
Nan Huang, Renata M. Wentzcovitch, Zepeng Wu +4
The Fe-Si-O ternary system, central to modeling the interiors of terrestrial planets, remains poorly constrained at Terapascal (TPa) pressures characteristic of super-Earth mantles…
Tetragonal Fe2O: the stable iron oxide at Earth's core conditions
Junjie Jiang, Zhen Zhang, Tongqi Wen +2
The Fe-O system is fundamental to understanding the composition and properties of the Earth's core. Recent studies have suggested the possible existence of stable, iron-rich FenO c…
The Fe-Ni phase diagram and the Earth's inner core structure
Liangrui Wei, Kai-Ming Ho, Renata M. Wentzcovitch +1
The Fe-Ni alloy is believed to be the main component of Earth's core. Yet, a comprehensive understanding of phase equilibria near the melting point of this alloy under core conditi…
Ferroelasticity, shear modulus softening, and the tetragonal-cubic transition in davemaoite
Tianqi Wan, Chenxing Luo, Zhen Zhang +2
Davemaoite (Dm), the cubic phase of CaSiO3-perovskite (CaPv), is a major component of the Earth's lower mantle. Understanding its elastic behavior, including its dissolution in bri…
Spin state of iron in I-42d-type Mg2SiO4 at ultra-high pressures
Tianqi Wan, Yang Sun, Renata M. Wentzcovitch
At extreme pressures of approximately 500 GPa, conditions characteristic of the deep interiors of super-Earths, the combination of NaCl-type MgO and post-perovskite-type MgSiO3 (PP…
Understanding the two-step nucleation of iron at Earth's inner core conditions: a comparative molecular dynamics study
Chen Gao, Kai-Ming Ho, Renata M. Wentzcovitch +1
Metastable phases can lead to multistep nucleation processes, influencing the liquid-to-solid transition in various systems. In this study, we investigate the homogeneous nucleatio…