Ferropericlase
(Mg0.058(1)Fe0.942(1))O
third-order Birch-Murnaghan · Original · 2019
V₀
9.86
ų/atom
Formula unit
K₀
155.300
GPa
Isothermal
K′
3.790
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 9.86 | 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
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron X-ray diffraction in diamond-anvil cell (helium medium), fit with MINUTI
- Sample
- B1-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
For the B1-cubic phase, the best fit parameters are V0 = 9.860 ± 0.007 Å3/atom, K0T = 155.3 ± 2.2 GPa, K'0T = 3.79 ± 0.11 (Table 1)
Additional notes
Kp prior
initial value of 3.8 with a prior window of 0.3
reduced chi2
0.70 ± 0.23
pressure range
1.5 to ~30 GPa for B1 phase (transition bracketed 30.1–34.5 GPa)
pressure scale
ruby fluorescence [28], NaCl secondary gauge