Post-perovskite
MgGeO3
third-order Birch-Murnaghan · Original · 2006
V₀
175.9
ų
Unit cell
K₀
245
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 175.9 | 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 | 1 |
| GeO2 | 1 |
Formula: MgGeO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- post-perovskite (CaIrO3-type, Cmcm)
- Method
- experiment (XRD / DAC / multianvil compression)in situ synchrotron x-ray diffraction, laser-heated diamond anvil cell (experiment)
- Sample
- MgGeO3 pPv, alternative fit with K'0 = 4
Source
- Paper
- Stability and equation of state of the post‐perovskite phase in MgGeO3 to 2 Mbar
- Authors
- Atsushi Kubo; Boris Kiefer; Guoyin Shen; Vitali B. Prakapenka; R. J. Cava; T. S. Duffy
- DOI
- 10.1029/2006gl025686
- Year
- 2006
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
If K'0 = 4, we obtain K0 = 245 ± 5 GPa and V0 = 175.9 ± 0.6 Å3, showing significant trade-off between K0 and K'0 due to lack of data at low pressures.
Additional notes
note
alternative fit illustrating trade-off between K0 and K'0