Ferroelastic hysteresis, shear modulus softening, and the tetragonal↔cubic transition in davemaoite
Tianqi Wan, Chenxing Luo, Zhen Zhang, Yang Sun, Renata M. Wentzcovitch · 2026
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Description
Wan, Luo, Zhang, Sun, and Wentzcovitch present a study from twenty twenty-six on a deep-Earth mineral's phase change. The mineral, davemaoite, is the lower mantle's third most abundant. Its shape shift between two crystal forms was uncertain territory. Machine-learned force models drive molecular simulations of the change. Clear strain memory shows around the transition point. Shear stiffness softens markedly across the shift as well. The team isolate true elasticity from slow relaxation effects.
Their benchmark caps sound speed estimates for models. If triggered in sunken basalt zones, the change could scatter seismic waves. It might also explain some slow patches deep below. Mixed compositions may host the shift where the pure mineral cannot.
Catalog record
| CREATOR | Tianqi Wan, Chenxing Luo, Zhen Zhang, Yang Sun, Renata M. Wentzcovitch |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 42 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |