Post-perovskite
MgSiO3
Birch-Murnaghan (order unspecified) · Original · 2006
V₀
124.5
ų
Unit cell
K₀
577
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 124.5 | 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
- 110 GPa
- 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
we also calculated the isothermal bulk modulus and volume using Anderson's gold standard (Anderson et al. 1989) at 110 GPa... Refinement yielded the equation-of-state parameters K110GPa = 577(20) GPa and V110GPa = 124.50(13) Å3 when the first pressure derivative of the bulk modulus was fixed at 4.
Additional notes
pressure standard
Au, Anderson et al. (1989)
reference pressure rationale
110 GPa corresponds to the transition pressure of CaIrO3-type MgSiO3