Bridgmanite
(Mg0.5Fe3+0.5)(Al0.5Si0.5)O3 (FA50)
second-order Birch-Murnaghan · Original · 2020
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.
V₀
170.7
ų
Unit cell
K₀
240
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 170.7 | 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 diamond anvil cell, cold compression (Au pressure calibrant, Ne medium)
- Sample
- Sample 2, cold compressed (no laser annealing)
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
Sample 2 was only cold compressed ... Its EoS parameters V0 = 170.7(3) ų, K0 = 240(3) GPa with K0' = 4(fixed) confirmed this observation.
Additional notes
note
Serves as reference for initial cation ordering; no cation exchange or spin transition expected