Bridgmanite
MgSiO3
second-order Birch-Murnaghan · Original · 2012
V₀
4.11
g·cm-3
Unknown basis
K₀
257
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 4.11 | 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 | 1 |
| SiO2 | 1 |
Formula: MgSiO3
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-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 for the Mg-Pv and (Mg-Fe)-Pv samples, respectively. Corresponding zero pressure densities were rho_0 = 4.110(1) g·cm-3 ... Table 2: This study (K' fixed) 257(2) 4
Additional notes
note
V0 field carries the reported zero-pressure density rho_0 (no unit-cell volume reported); Archimedes bench-top density 4.11 g·cm-3