Bridgmanite
Mg0.95Fe(2+)0.04Fe(3+)0.01SiO3 (3.5 wt% FeO)
second-order Birch-Murnaghan · Original · 2012
V₀
4.161
g·cm-3
Unknown basis
K₀
246
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 4.161 | g·cm-3 | 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 | 0.95 |
| FeO | 0.04 |
| Fe2O3 | 0.005 |
| SiO2 | 1 |
Formula: Mg0.95Fe2+0.04Fe3+0.01SiO3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)in situ X-ray diffraction / density measurements in multianvil press (room-temperature density data fit)
- Sample
- hot-pressed polycrystalline (Mg-Fe)-Pv (this study)
Source
- Paper
- Acoustic velocities of pure and iron‐bearing magnesium silicate perovskite meas…
- Authors
- Julien Chantel; D. J. Frost; Catherine McCammon; Zhicheng Jing; Yanbin Wang
- DOI
- 10.1029/2012gl053075
- Year
- 2012
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Fitting the room temperature density data to a 2nd order Birch-Murnaghan equation of state, i.e. with K' = 4, yields estimates for the room pressure isothermal bulk moduli K_T of 257(2) and 246.0(2) GPa ... Corresponding zero pressure densities were ... rho_0 = 4.161(1) g·cm-3 for ... the (Fe, Mg)-Pv samples. Table 2: This study (K' fixed) 246(2) 4
Additional notes
note
Table 2 lists this value as 246(2) GPa; text gives 246.0(2) GPa. V0 field carries zero-pressure density; Archimedes density 4.16 g·cm-3