Ferropericlase
(Mg0.22Fe0.78)O
third-order Birch-Murnaghan · Original · 2017
Why this differs from similar rows?
This study's cubic fit to single-crystal data in helium medium, 1.8-55.5 GPa; other rows use neon medium, a different pressure range/structure, or Zhuravlev et al. (2010) data.
V₀
78.87
ų
Unit cell
K₀
148
GPa
Isothermal
K′
4.090
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 78.87 | ų | Unit cell | — |
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 | 0.22 |
| FeO | 0.78 |
Formula: (Mg0.22Fe0.78)O
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)single-crystal X-ray diffraction (SXRD), diamond-anvil cell, He pressure medium
- Sample
- Mw78 single crystal in helium medium
Source
- Paper
- Single-crystal equations of state of magnesiowüstite at high pressures
- Authors
- Gregory J. Finkelstein; Jennifer M. Jackson; W. Sturhahn; Dongzhou Zhang; E. Ercan; T. S. Toellner
- DOI
- 10.2138/am-2017-5966
- Year
- 2017
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The best fit-parameters for a crystal with cubic structure in helium are K0T = 148(3) GPa, K'0T = 4.09(12), and V0 = 78.87(6) Å3. Table 3: This Study (cubic), (Mg0.22Fe0.78)O, Helium, SXRD, 1.8-55.5 GPa.
Additional notes
P range GPa
1.8-55.5
V0 prior
Prior of V0 = 78.94 ± 0.1 Å3 (measured ambient unit-cell volume from ALS 11.3.1) used during equation of state fit
fitting software
MINUTI (ver.2.0)