Bridgmanite
(Mg0.75,Fe0.25)SiO3 (x = 0.25)
third-order Birch-Murnaghan · Original · 2002
Why this differs from similar rows?
Table 1 value from Eulerian strain fits to elastic constants, VRH-averaged, x=0.25 (K=268, K'=4.10); sibling row instead reports the volumetric EOS fit (K0=270, K'=3.96).
V₀
—
Unknown basis
K₀
268
GPa
Unknown
K′
4.100
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 | 0.75 |
| FeO | 0.25 |
| SiO2 | 1 |
Formula: (Mg0.75Fe0.25)SiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- first-principles DFT / ab initiofirst-principles plane-wave pseudopotential DFT (LDA), spin-polarized, static (0 K)
- Sample
- Table 1, this work (x = 0.25), Voigt-Reuss-Hill average
Source
- Paper
- Elasticity of (Mg,Fe)SiO3‐perovskite at high pressures
- Authors
- Boris Kiefer; Lars Stixrude; Renata M. Wentzcovitch
- DOI
- 10.1029/2002gl014683
- Year
- 2002
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: M0^b (This work, x = 0.25): K = 268, M'0 = 4.10; obtained from third order eulerian strain fits [Davies, 1974] and Voigt-Reuss-Hill averages.
Additional notes
G0 GPa
168
Gp
1.57
notes
VRH-averaged elastic moduli at zero pressure, consistent with EOS-derived K0 = 270.0 GPa, K'0 = 3.96.