Wüstite
Fe0.93O
third-order Birch-Murnaghan · Original · 2005
Why this differs from similar rows?
Rhombohedral-phase fit made directly at a 1 atm reference pressure over 23-51 GPa with K' fixed to 4.0; authors state this is their 'best estimate' for this phase.
V₀
59.72
ų
Unit cell
K₀
134
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 59.72 | 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 |
|---|---|
| FeO | 0.93 |
Formula: Fe0.93O
Conditions & method
- Tref
- 300 K
- Pref
- 0.000 GPa
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)single-crystal synchrotron X-ray diffraction, diamond-anvil cell, helium pressure medium, ruby fluorescence pressure scale
- Sample
- same single crystal as cubic Fe0.93O, high-pressure phase, P-V data fitted with 1 atm reference pressure
Source
- Paper
- Single-crystal synchrotron X-ray diffraction study of wüstite and magnesiowüsti…
- Authors
- Steven D. Jacobsen; Jung‐Fu Lin; R. J. Angel; Guoyin Shen; Vitali B. Prakapenka; Przemysław Dera; Ho-kwang Mao; Russell J. Hemley
- DOI
- 10.1107/s0909049505022326
- Year
- 2005
- Journal
- Journal of Synchrotron Radiation
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The P-V data were then fitted using an ambient reference pressure of 1 atm (but without the calculated V0) using fixed K' = 4.0, resulting in V0 = 59.72 (±0.22) Å3 and K0 = 134 (±4) GPa... we conclude that a best estimate for the bulk modulus of rhombohedral Fe0.93O is 134 (±4) GPa, assuming K' = 4. Table 2: Rhomb Fe0.93O, P range 23–51, V0 59.72 (±0.22)†, K0 134 (±4)†, K' 4.0 (fixed).
Additional notes
P range GPa
23-51
rho0 g cm3
5.667 (±0.018)
MV0 cm3
11.99 (±0.04)
table footnote
Calculated by directly fitting the experimental P-V data with 1 atm reference pressure
best estimate
K0 = 134 (±4) GPa is stated as best estimate for rhombohedral Fe0.93O