Ferropericlase
(Mg0.6,Fe0.4)O; parameters given as function of X_Fe
Birch-Murnaghan (order unspecified) · Original · 1992
V₀
11.25
Molar
K₀
157
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 11.25 | — | Molar | — |
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 | 0.6 |
| FeO | 0.4 |
Formula: (Mg0.6Fe0.4)O
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron x-ray diffraction in externally heated diamond anvil cell
- Sample
- Fig. 3 model assemblage calculation
Source
- Paper
- Thermoelasticity of Silicate Perovskite and Magnesiowüstite and Stratification …
- Authors
- Lars Stixrude; Russell J. Hemley; Yingwei Fei; H. K. Mao
- DOI
- 10.1126/science.257.5073.1099
- Year
- 1992
- Journal
- Science
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Magnesiowüstite parameters are V0 = 11.25 ± 1.00 X_Fe, K0 = 157 ± 2 GPa, K0' = 4.0 ± 0.4, θ0 = 500 ± 50 K, γ0 = 1.50 ± 0.03, q = 1.1 ± 0.7 (17).
Additional notes
theta0
500 ± 50 K
gamma0
1.50 ± 0.03
q
1.1 ± 0.7
Fe Mg partition coefficient Pv Mw
K_Pv-Mw = 1/6
note
V0 units not explicitly stated in Fig. 3 caption; V0 expression as printed includes '± 1.00 X_Fe', likely a compositional dependence term.