Bridgmanite
(Mg1-xFex)SiO3 (properties of MgSiO3 used as approximation; XMg = 94 in Mg-Pv)
third-order Birch-Murnaghan · Original · 2009
V₀
—
Unknown basis
K₀
253
GPa
Adiabatic
K′
4.300
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| — | — | 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 | 0.94 |
| FeO | 0.06 |
| SiO2 | 1 |
Formula: (Mg1-xFex)SiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- perovskite (unspecified)
- Method
- experiment (Brillouin / ultrasonic / elasticity)fit of simultaneous P and S wave velocity and density (ultrasonic) data of Li and Zhang [15] to finite strain equations, with thermal expansion constrained from previous P-V-T studies
- Sample
- Table 1, values without square brackets (refit of Li and Zhang [15] data)
Source
- Paper
- Characteristics of lateral heterogeneities with thermal and chemical origins in…
- Authors
- Baosheng Li
- DOI
- 10.1016/j.pnsc.2009.09.002
- Year
- 2009
- Journal
- Progress in Natural Science Materials International
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: (Mg1-xFex)SiO3: rho (g/cm3) = 4.108 + 1.09x; K_S (GPa) = 253(2); K_S' = [4.4(10)] 4.3(10). 'The elastic moduli and their respective pressure and temperature derivatives for Mg-Pv are obtained by fitting the velocity and density data obtained by Li and Zhang [15] to the finite strain (Eqs. (2)-(4)).' 'those without square brackets are results obtained from fit to the data of Li and Zhang [15] using Eqs. (1)-(3).'
Additional notes
rho0
4.108 + 1.09x g/cm3
dKS dT
-0.017(2) GPa/K
G0
173(2) GPa
Gp
2.0(1)
dG dT
-0.025(2) GPa/K
alpha a
1.98e-5 K^-1 (fixed when fit to data of Li and Zhang [15])
alpha b
0.8e-8 K^-2 (fixed)
gamma
1.33 (fixed)
note
No V0 reported; density at zero pressure given instead. f^2 terms retained in K and G expressions unlike Li and Zhang [15].