Bridgmanite
(Mg0.5Fe3+0.5)(Al0.5Si0.5)O3 (FA50)
second-order Birch-Murnaghan · Original · 2020
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).
V₀
172
ų
Unit cell
K₀
230
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 172 | ų | Unit cell | — |
Reported value and unit are preserved as extracted. Z (formula units per cell) is not stored yet, so molar ↔ ų/f.u. conversion is not applied automatically.
Composition
| Oxide | Molar |
|---|---|
| MgO | 0.5 |
| Fe2O3 | 0.25 |
| Al2O3 | 0.25 |
| SiO2 | 0.5 |
Formula: (Mg0.5Fe3+0.5)(Al0.5Si0.5)O3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- perovskite (unspecified)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron powder XRD in laser-annealed diamond anvil cell (Au pressure calibrant, Ne medium)
- Sample
- Sample 1, fit to data after laser annealing only
Source
- Paper
- Synthesis, Elasticity, and Spin State of an Intermediate MgSiO3‐FeAlO3 Bridgman…
- Authors
- Feng Zhu; Jiachao Liu; Xiaojing Lai; Yuming Xiao; Vitali B. Prakapenka; Wenli Bi; E. Ercan; Przemysław Dera; Bin Chen; Jie Li
- DOI
- 10.1029/2020jb019964
- Year
- 2020
- Journal
- Journal of Geophysical Research Solid Earth
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Fitting only the data after laser annealing (red squares in Figure 3) yields V0 = 172.0(7) ų, K0 = 230(6) GPa with K0' = 4(fixed)
Additional notes
note
Second-order BM-EoS validity supported by flat F-f plot; compression at 300 K up to ~102 GPa