Ferropericlase
(Mg1-xFex)O, x = 0.17-0.2
second-order Birch-Murnaghan · Original · 2007
V₀
71
ų
Unit cell
K₀
186
GPa
Isothermal
K′
4.600
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 71 | 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 | 0.83 |
| FeO | 0.17 |
Formula: (Mg1-xFex)O
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron X-ray diffraction, diamond-anvil cell, room temperature
- Sample
- low-spin data of Lin et al. [2005] above 80 GPa, G vs g analysis
Source
- Paper
- Effects of Fe spin transition on the elasticity of (Mg, Fe)O magnesiowüstites a…
- Authors
- S. Speziale; V. E. Lee; S. M. Clark; Jung‐Fu Lin; M. Pasternak; Raymond Jeanloz
- DOI
- 10.1029/2006jb004730
- Year
- 2007
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
A second-order polynomial G versus g fit to Lin et al.'s low-spin data (equivalent to a third order Burch-Murnaghan equation of state) yields V0 = 71 (±5) Å3, KT0 = 186 (±150) GPa and (∂KT/∂P)T0 = 4.6 (±2.7).
Additional notes
V0LS V0HS ratio
0.94 (±0.06)
constrained range
K_T0 constrained to 246-136 GPa and (∂KT/∂P)T0 to 3.6-5.4 for V0LS/V0HS = 0.91-0.97
spin state
low-spin