Ferropericlase
(Mg0.490(3)Fe0.483(2)Ti0.027(5))O (Fp48, 48 mol% FeO)
spin-crossover EOS · Original · 2016
Why this differs from similar rows?
High-spin (HS) state fit with K' free (4.12); sibling row is the low-spin (LS) state of the same sample, fitted with K' fixed to 4 since it was unconstrained by the data.
V₀
77.29
ų
Unit cell
K₀
160
GPa
Isothermal
K′
4.120
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 77.29 | 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 | 0.49 |
| FeO | 0.483 |
| TiO2 | 0.027 |
Formula: (Mg0.490Fe0.483Ti0.027)O
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)X-ray diffraction (DAC, Ne pressure medium, ruby scale)
- Sample
- Fp48, polycrystalline, 95% 57Fe-enriched, this study; high-spin (HS) state
Source
- Paper
- Equation of state and spin crossover of (Mg,Fe)O at high pressure, with implica…
- Authors
- Natalia Solomatova; Jennifer M. Jackson; W. Sturhahn; J. K. Wicks; Jiyong Zhao; T. S. Toellner; Bora Kalkan; William Steinhardt
- DOI
- 10.2138/am-2016-5510
- Year
- 2016
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The zero-pressure bulk modulus K0T,HS for the HS state is 160(2) GPa with a K'0T,HS of 4.12(14) and a unit-cell V0,HS of 77.29(0) Å3. Table 7: (Mg0.49Fe0.48)O, V0,HS 77.29(0), K0T,HS 160(2), K'0T,HS 4.12(14), This study.
Additional notes
P tr GPa
68.8(2.7)
P tr width GPa
18.4
prior K0T HS
160 (±5) GPa
ambient measured volume
77.29(1) Å3 at 0.0(0) GPa (Table 1)