Bridgmanite
Mg0.88Fe0.1Al0.14Si0.90O3 (Fe10-Al14-Bgm), Fe3+/ΣFe = ~0.65 (Table 3 lists Mg0.93Fe3+0.048Fe2+0.032Al0.10Si0.90O3)
third-order Birch-Murnaghan · Original · 2022
V₀
—
Unknown basis
K₀
326
GPa
Adiabatic
K′
3.320
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| — | — | Unknown basis | — |
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 | 0.93 |
| FeO | 0.032 |
| Fe2O3 | 0.024 |
| Al2O3 | 0.05 |
| SiO2 | 0.9 |
Formula: Mg0.88Fe0.1Al0.14Si0.90O3 (Fe10-Al14-Bgm), Fe3+/ΣFe = ~0.65 (Table 3 lists Mg0.93Fe3+0.048Fe2+0.032Al0.10Si0.90O3)
Conditions & method
- Tref
- 300 K
- Pref
- 25 GPa
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (Brillouin / ultrasonic / elasticity)single-crystal Brillouin light scattering + impulsive stimulated light scattering in DAC, with synchrotron XRD density
- Sample
- single crystal, run 5K2667 (this study)
Source
- Paper
- Single-crystal elasticity of (Al,Fe)-bearing bridgmanite up to 82 GPa
- Authors
- Suyu Fu; Yanyao Zhang; Takuo Okuchi; Jung‐Fu Lin
- DOI
- 10.2138/am-2022-8435
- Year
- 2022
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The best fits yield K_S = 326 ± 4 GPa, µ = 211 ± 2 GPa, K'_S = 3.32 ± 0.04, and µ' = 1.66 ± 0.02 GPa at 25 GPa (Table 2); Table 3 (BLS): This study, Mg0.93Fe3+0.048Fe2+0.032Al0.10Si0.90O3, K_S0 = 326(4), µ0 = 211(2), K'_S0 = 3.32(4), µ'0 = 1.66(2); The reference pressure is 25 GPa.
Additional notes
mu0 GPa
211(2)
mu0 prime
1.66(2)
note
Reference pressure is 25 GPa, not ambient