Bridgmanite
MgSiO3 (0% Fe)
Vinet · Original · 2015
Why this differs from similar rows?
V0 fitted freely (Bayesian prior) from reanalyzed Tange et al. (2012) data, giving V0=162.12, K0=262.3; differs from sibling's fixed-V0 conditional fit.
V₀
162.12
ų
Unit cell
K₀
262.300
GPa
Isothermal
K′
4.044
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.12 | 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
- 300 K
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)reanalysis of sintered-diamond multianvil and DAC X-ray diffraction data (Tange et al. 2012), MgO pressure scale (Tange et al. 2009a)
- Sample
- Fe-free bridgmanite, data of Tange et al. [2012] reanalyzed in this study (Table 3)
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
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 3. Vinet and Mie-Grüneisen-Debye Equation of State Parameters for Bridgmanite: XFe = 0%: V0 (Å3) 162.12(13), K0T (GPa) 262.3(32), K'0T 4.044(75), Θ0 (K) 1000, γ0 1.675(45), q 1.39(16). Data reanalyzed from Tange et al. [2012] — uses MgO pressure scale from Tange et al. [2009a].
Additional notes
Theta0 K
1000 (fixed; best fit was 991 ± 77 K)
gamma0
1.675(45)
q
1.39(16)
V0 prior
162.5 ± 0.2 Å3
note
V0 fitted using Bayesian prior; errors are 68% confidence intervals