Post-perovskite
MgSiO3
second-order Birch-Murnaghan · Cited · 2009
V₀
162.2
ų
Unit cell
K₀
231
GPa
Adiabatic
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.2 | 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
- —
- Pref
- —
- Structure
- post-perovskite (CaIrO3-type, Cmcm)
- Method
- experiment (XRD / DAC / multianvil compression)static compression (laser-heated diamond anvil cell P-V-T)
- Sample
- static P-V-T data of Guignot et al. [2007]
Source
- Paper
- The MgSiO3system at high pressure: Thermodynamic properties of perovskite, post…
- Authors
- J. L. Mosenfelder; Paul D. Asimow; D. J. Frost; D. C. Rubie; Thomas J. Ahrens
- DOI
- 10.1029/2008jb005900
- Year
- 2009
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Cited (quoted from earlier work)
Evidence from the paper
'values that are significantly different from the second-order Birch-Murnaghan fit (K0S = 231 GPa, K' fixed to 4) that Guignot et al. [2007] applied to their data'; 'for postperovskite we assume the value of V0 = 162.2 Å3 given by Guignot et al. [2007]'; 'requiring an assumption of K' = 4'
Additional notes
cited source
Guignot et al. [2007]