Ferropericlase
(Mg0.058(1)Fe0.942(1))O
third-order Birch-Murnaghan · Original · 2019
V₀
9.59
ų/atom
Formula unit
K₀
217
GPa
Isothermal
K′
2.060
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 9.59 | ų/atom | Formula unit | — |
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 | 0.058 |
| FeO | 0.942 |
Formula: (Mg0.058Fe0.942)O
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- other / unspecified
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron X-ray diffraction in diamond-anvil cell (helium medium), fit with MINUTI
- Sample
- r-Mw94, polycrystalline, 95% enriched 57Fe, helium pressure medium
Source
- Paper
- Evaluating the Role of Iron-Rich (Mg,Fe)O in Ultralow Velocity Zones
- Authors
- Vasilije V. Dobrosavljevic; W. Sturhahn; Jennifer M. Jackson
- DOI
- 10.3390/min9120762
- Year
- 2019
- Journal
- Minerals
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
We fit a third-order Burch–Murnaghan isothermal equation of state to the pressure–volume data for the rhombohedral phase and found best fit parameter values V0 = 9.59 ± 0.10 Å3/atom, K0T = 217 ± 19 GPa, K'0T = 2.06 ± 0.22, with a reduced χ2 value of 1.37 ± 0.37
Additional notes
reduced chi2
1.37 ± 0.37
stability range
rhombohedral phase from 34.5 GPa up to at least 88.7 GPa