Post-perovskite
MgSiO3
third-order Birch-Murnaghan · Original · 2006
Why this differs from similar rows?
Fit uses Jamieson's gold pressure standard; sibling rows use Anderson's or Dewaele's gold scale on the same P-V data, giving different K0.
V₀
162.86
ų
Unit cell
K₀
226
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
Using all the data, values of 237(1), 226(1), and 248(1) GPa were obtained for Anderson's, Jamieson's, and Dewaele's gold standards, respectively. Table 3: 226(1) | 4 (fixed) | 162.86(fixed) | Au† | This study.
Additional notes
pressure standard
Au, Jamieson et al. (1982)
V0 source
fixed to theoretical LDA value of Oganov and Ono (2004)
note
Figure 2 caption quotes 225(1) GPa for the Jamieson scale fit; Table 3 and text report 226(1) GPa