Ferropericlase
(Mg0.75,Fe0.25)O
third-order Birch-Murnaghan · Original · 2012
V₀
76.372
ų
Unit cell
K₀
160
GPa
Isothermal
K′
4.220
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 76.372 | 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 | 0.75 |
| FeO | 0.25 |
Formula: (Mg0.75Fe0.25)O
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron powder X-ray diffraction, Kawai-type multi-anvil apparatus with sintered diamond anvils (Au pressure scale of Matsui 2010)
- Sample
- synthesized (Mg0.75,Fe0.25)O Fp powder, Table 3
Source
- Paper
- Static compression of (Mg0.83,Fe0.17)O and (Mg0.75,Fe0.25)O ferropericlase up t…
- Authors
- Masanori Matsui; Etsuro Ito; Daisuke Yamazaki; Takashi Yoshino; Xiaohan Guo; Shuangming Shan; Y. Higo; K.-i. Funakoshi
- DOI
- 10.2138/am.2012.3937
- Year
- 2012
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 3: (Mg0.75,Fe0.25)O Fp with HS Fe2+: V0 (Å3) 76.372(16); K0T (GPa) 160 (fixed); K'0T 4.22(3); Θ0 (K) 500 (fixed); γ0 1.64(4); q 0.7(2). Text: 'K'0T ... 4.22 ± 0.03 ... for (Mg0.75,Fe0.25)O'.
Additional notes
Theta0 K
500 (fixed)
gamma0
1.64(4)
q
0.7(2)
measured ambient volume A3
76.368(13) (Table 2, 300 K, 0 GPa)
measured ambient lattice parameter A
4.2427(2)
fit data range
compression data below ~47 GPa (HS state only)
dK0T dT GPa per K
-0.028 (300-700 K, calculated)