Post-perovskite
MgSiO3
third-order Birch-Murnaghan · Original · 2006
Why this differs from similar rows?
Fit uses Anderson's gold pressure standard; sibling rows use Jamieson's or Dewaele's gold scale on the same P-V data, giving different K0.
V₀
162.86
ų
Unit cell
K₀
237
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.86 | 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 |
| SiO2 | 1 |
Formula: MgSiO3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- post-perovskite (CaIrO3-type, Cmcm)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron powder X-ray diffraction, laser-heated diamond anvil cell, 116-144 GPa
- Sample
- synthesized from synthetic MgSiO3 enstatite in laser-heated DAC
Source
- Paper
- Equation of state of CaIrO3-type MgSiO3 up to 144 GPa
- Authors
- Shigeaki Ono
- DOI
- 10.2138/am.2006.2118
- Year
- 2006
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Pressure-volume data could be fitted to the Birch-Murnaghan equation of state with K0 = 237(1) GPa using Anderson's gold pressure standard, when K0' and V0 were set to 4 and 162.86 Å3, respectively. Table 3: 237(1) | 4 (fixed) | 162.86(fixed) | Au* | This study.
Additional notes
pressure standard
Au, Anderson et al. (1989)
V0 source
fixed to theoretical LDA value of Oganov and Ono (2004)