Synthesis, Elasticity, and Spin State of an Intermediate MgSiO3‐FeAlO3 Bridgmanite: Implications for Iron in Earth's Lower Mantle
10.1029/2020jb019964 · 2020 · Journal of Geophysical Research Solid Earth
Feng Zhu; Jiachao Liu; Xiaojing Lai; Yuming Xiao; Vitali B. Prakapenka; Wenli Bi; E. Ercan; Przemysław Dera; Bin Chen; Jie Li
5 EOS records from this paper
| Phase | Composition | Tref | V₀ | K₀ (GPa) | K′ | EOS model | Method note | Origin | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bridgmanite |
|
300 K | 172 ų Unit cell |
230 | 4 | second-order Birch-Murnaghan | — | Original | ||||||||||
| Why this differs from similar rows: Sample 1, fit using only the post-laser-annealing data (red squares in Fig. 3); sibling rows use different sample/data subsets (Sample 1 combined data; Sample 2 cold-compressed only). | ||||||||||||||||||
| Bridgmanite |
|
300 K | 172.1 ų Unit cell |
229 | 4 | second-order Birch-Murnaghan | — | Original | ||||||||||
| Why this differs from similar rows: Sample 1, fit using both pre- and post-annealing data combined; authors state this denser, lower-uncertainty fit is their preferred/representative EoS (also quoted in the abstract), unlike the annealed-only fit (sibling row). | ||||||||||||||||||
| Bridgmanite |
|
300 K | 170.7 ų Unit cell |
240 | 4 | second-order Birch-Murnaghan | — | Original | ||||||||||
| Why this differs from similar rows: Sample 2, a separate cold-compressed (never laser-annealed) sample used as a reference for initial cation ordering; differs from Sample 1's fits (sibling rows), which involve laser annealing. | ||||||||||||||||||
| Bridgmanite |
|
— | 176.5 ų Unit cell |
212 | 3.970 | unknown | — | Original | ||||||||||
| Bridgmanite | FA10 (Fe,Al-bearing MgSiO3 bridgmanite) | — | — | — | 3.440 | unknown | — | Cited | ||||||||||