Wüstite
FeO (Fe1-xO wüstite; this study's sample Fe0.94O)
Birch-Murnaghan (order unspecified) · Cited · 2004
V₀
—
Unknown basis
K₀
154.800
GPa
Isothermal
K′
5.060
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 |
|---|---|
| FeO | 1 |
Formula: FeO
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (Brillouin / ultrasonic / elasticity)ultrasonic elasticity measurements (Jackson et al. 1990, cited)
- Sample
- FeO equation of state from Jackson et al. [15], used to calculate change in sample length with pressure
Source
- Paper
- Pressure-Induced Magnetization in FeO: Evidence from Elasticity and Mössbauer S…
- Authors
- Anastasia Kantor; Steven D. Jacobsen; I. Kantor; Leonid Dubrovinsky; Catherine McCammon; H. J. Reichmann; I. N. Goncharenko
- DOI
- 10.1103/physrevlett.93.215502
- Year
- 2004
- Journal
- Physical Review Letters
- Origin
- Cited (quoted from earlier work)
Evidence from the paper
An isothermal equation of state for FeO [15] was used to calculate the change in sample length with pressure. ... [15] I. Jackson et al., J. Geophys. Res. 95, 21671 (1990). Birch Murnagham's equation of state for FeO: K = 154.8(2) GPa, K' = 5.06(6) GPa.
Additional notes
note on Kp unit
The paper prints 'K' = 5.06(6) GPa', although K' is normally dimensionless; value copied verbatim.
K0 type note
Referred to in text as 'an isothermal equation of state for FeO [15]'.
usage
This cited EOS was used to compute sample length change with pressure for GHz ultrasonic elasticity measurements of Fe0.94O to 9.6 GPa.
ambient cell parameter this study
a = 4.3068(1) Å for Fe0.94O single crystal (measured at ambient conditions; lattice parameter, not a fitted V0)
isotropic adiabatic moduli linear fits this study
{
"KS_below_4.7GPa": "KS = 153(1) + 6.1(4)*P (GPa)",
"KS_4.7_to_10GPa": "KS = 165(1) + 3.7(3)*P (GPa)",
"note": "These are linear pressure fits to adiabatic bulk modulus from GHz ultrasonics, not static EOS fit parameters."
}