Bridgmanite
MgSiO3 (Fe-free)
unknown · Cited · 2015
V₀
162.373
ų
Unit cell
K₀
—
K′
—
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.373 | 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 | 1 |
| SiO2 | 1 |
Formula: MgSiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)X-ray diffraction (sintered-diamond multianvil and DAC), original Tange et al. [2012] analysis
- Sample
- Fe-free bridgmanite, Tange et al. [2012] originally reported values
Source
- Paper
- The thermal equation of state of (Mg, Fe)SiO3bridgmanite (perovskite) and impli…
- Authors
- Aaron S. Wolf; Jennifer M. Jackson; Przemeslaw K. Dera; Vitali B. Prakapenka
- DOI
- 10.1002/2015jb012108
- Year
- 2015
- Journal
- Journal of Geophysical Research Solid Earth
- Origin
- Cited (quoted from earlier work)
Evidence from the paper
Both Tange's measured zero-pressure volume (162.373 Å3) and the typical measured value (162.5 Å3, see Figure 3) exceed our fitted value (162.12 ± 0.13 Å3) by about 2σ and 3σ, respectively ... The cold parameter offset is primarily caused by Tange's fixing of V0 to its measured value.
Additional notes
note
Original Tange et al. [2012] K0 and K' values are shown graphically (Figure 6 black cross) but not quoted numerically in this text