Post-perovskite
MgSiO3
third-order Birch-Murnaghan · Original · 2005
V₀
40.8
ų/f.u.
Formula unit
K₀
203
GPa
Isothermal
K′
4.190
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 40.8 | ų/f.u. | Formula unit | — |
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
- first-principles DFT / ab initiofirst-principles static calculation (DFT-LDA)
- Sample
- —
Source
- Paper
- Effect of chemistry on the stability and elasticity of the perovskite and post‐…
- Authors
- Razvan Caracas; R. E. Cohen
- DOI
- 10.1029/2005gl023164
- Year
- 2005
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1, MgSiO3 ppv: V0 = 40.80(38.39) Å^3/3 O atoms, K0 = 203(243) GPa, K' = 4.19(4.05); LDA value with GGA in parentheses. We fit third order Birch-Murnagham equations of state (EOS) to the computed pressure-volume relations.
Additional notes
exchange correlation
LDA
note
Static (athermal) calculation; no temperature effect included