Wüstite
Fe0.943O
third-order Birch-Murnaghan · Original · 1990
Why this differs from similar rows?
Reports isothermal pressure derivative (dKS/dP)_T=4.90 from ultrasonic Cij(P) data, used with Birch-Murnaghan extrapolation; sibling row reports isentropic derivative instead.
V₀
—
Unknown basis
K₀
154.900
GPa
Adiabatic
K′
4.900
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 | 0.943 |
Formula: Fe0.943O
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (Brillouin / ultrasonic / elasticity)ultrasonic interferometry (phase comparison) to 3 GPa; K(P) from Cij(P), extrapolated via Birch-Murnaghan
- Sample
- synthetic single-crystal wüstite grown by floating-zone technique
Source
- Paper
- Elasticity, shear‐mode softening and high‐pressure polymorphism of wüstite (Fe1…
- Authors
- Ian Jackson; S. K. Khanna; A. Revcolevschi; J. Berthon
- DOI
- 10.1029/jb095ib13p21671
- Year
- 1990
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
"this choice of parameters (a1 = K0S = 154.9 GPa, a2 = (dKS/dP)T = 4.90, a3 = K0'S/2 = -0.018 GPa-1) yields a description of K(P)..." and "extrapolated to much higher pressures via third-order Eulerian isotherms and isentropes based on K0S = 154.9 GPa and (dKs/dP)T = 4.90."
Additional notes
a3 K0primeS over 2
-0.018 GPa^-1
note
Parameters selected via intersection of the manganin-gauge covariance ellipsoid major axis with the Birch-Murnaghan constraint surface K0K0'' = K0'(7-K0') - 143/9
lattice parameter a
430.7 ± 0.1 pm
density
5708 kg m^-3 (X-ray); 5709 ± 5 kg m^-3 (immersion)