Bridgmanite
(Fe0.08Mg0.92)SiO3
third-order Birch-Murnaghan · Original · 2011
Why this differs from similar rows?
Fit restricted to the P<70 GPa subset of run M868's data; sibling row uses the full dataset to >90 GPa. Deviation above 70 GPa is noted as possibly linked to an Fe spin transition.
V₀
—
Unknown basis
K₀
257
GPa
Isothermal
K′
4.300
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 | 0.92 |
| FeO | 0.08 |
| SiO2 | 1 |
Formula: (Mg0.92Fe0.08)SiO3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)in situ X-ray diffraction in Kawai-type multianvil apparatus with sintered diamond anvils (SPring-8, SPEED-Mk.II)
- Sample
- sintered mixture of (Fe0.08Mg0.92)SiO3 perovskite and Au, run M868 (data restricted to P < 70 GPa)
Source
- Paper
- High Pressure Generation in a Kawai-Type Apparatus Equipped with Sintered Diamo…
- Authors
- Daisuke Yamazaki
- DOI
- 10.4131/jshpreview.21.272
- Year
- 2011
- Journal
- The Review of High Pressure Science and Technology
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
本実験から得られた体積データを 70 GPa 未満の領域と,70 GPa 以上の領域に分け,70 GPa 未満のデータを用いて,体積弾性率とその圧力微分値をもとめた(Fig. 8)。その結果,KT0=257 GPa,K′=4.3 となった。 (Fig. 8: The data in the pressure range less than 70 GPa were fitted to the third-order Birch-Murnaghan equation of state. The results show KT0 equal to 257 GPa and K′ equal to 4.3.)
Additional notes
pressure range
P < 70 GPa subset
note
Fit consistent with Katsura et al. [13]; deviation above 70 GPa possibly related to Fe spin transition in perovskite