Bridgmanite
(Mg0.88Fe3+0.065Fe2+0.035Al0.03)(Al0.11Si0.90)O3
Birch-Murnaghan (order unspecified) · Original · 2023
Why this differs from similar rows?
AO12 pseudo-dodecahedron polyhedral volume with K' fixed to 4; sibling row 1154 fits K' freely for the same polyhedron.
V₀
34.71
ų
Polyhedron
K₀
240
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 34.71 | ų | Polyhedron | — |
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 | 0.88 |
| FeO | 0.035 |
| Fe2O3 | 0.0325 |
| Al2O3 | 0.07 |
| SiO2 | 0.9 |
Formula: (Mg0.88Fe3+0.065Fe2+0.035Al0.03)(Al0.11Si0.90)O3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)single-crystal X-ray diffraction, polyhedral volumes from refined atomic coordinates, up to 64.6(6) GPa
- Sample
- Fe10-Al14-Bgm, AO12 pseudo-dodecahedron polyhedral volume (K' fixed)
Source
- Paper
- Single-crystal X-ray diffraction on the structure of (Al,Fe)-bearing bridgmanit…
- Authors
- Suyu Fu; Stella Chariton; Yanyao Zhang; Takuo Okuchi; Vitali B. Prakapenka; Jung‐Fu Lin
- DOI
- 10.2138/am-2023-8969
- Year
- 2023
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Fitting the pressure-volume data using Birch-Murnaghan EoS yields K_T0 = 240 ± 2 GPa, V0 = 34.71 ± 0.02 Å3 ... for AO12 pseudo-dodecahedra ... with a fixed K'0 of 4 (Table 1)
Additional notes
volume type
AO12 pseudo-dodecahedron polyhedral volume