Bridgmanite
(Mg,Fe)SiO3 with 9 mol.% FeSiO3
second-order Birch-Murnaghan · Original · 2006
V₀
163.3
ų
Unit cell
K₀
255
GPa
Isothermal
K′
3.700
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 163.3 | 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 | 0.9 |
| FeO | 0.09 |
| CaO | 0.005 |
| Al2O3 | 0.0025 |
| SiO2 | 1 |
Formula: (Mg,Fe)SiO3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)laser-heated diamond anvil cell, synchrotron x-ray diffraction; P-V data at 83-106 GPa plus zero-pressure volume from recovered sample
- Sample
- pv synthesized from natural orthopyroxene, coexisting with ppv; V0 from recovered sample
Source
- Paper
- Equation of state of the postperovskite phase synthesized from a natural (Mg,Fe…
- Authors
- S. R. Shieh; T. S. Duffy; Atsushi Kubo; Guoyin Shen; Vitali B. Prakapenka; Nagayoshi Sata; Kei Hirose; Yasuo Ohishi
- DOI
- 10.1073/pnas.0506811103
- Year
- 2006
- Journal
- Proceedings of the National Academy of Sciences
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The EOS for pv was calculated by using pressure-volume data at 83-106 GPa together with the experimentally determined zero-pressure volume from the recovered sample [V0 = 163.3(1) ų]. Table 1: This study, experiment: V0 163.3 (1), K0 255 (10), dK0/dP 3.7* (*Fixed value).
Additional notes
bulk modulus at 120GPa
663(26) GPa
table column
Table 1, pv, This study, experiment