Bridgmanite
MgSiO3 (x = 0)
third-order Birch-Murnaghan · Original · 2002
Why this differs from similar rows?
EOS-derived value from a volumetric fit (V0=159.6, K0=264.3, K'=3.94) for x=0; sibling row instead reports elastic-constant-derived (VRH-averaged) moduli from Eulerian strain fits.
V₀
159.6
ų
Unit cell
K₀
264.300
GPa
Unknown
K′
3.940
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 159.6 | 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
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- first-principles DFT / ab initiofirst-principles plane-wave pseudopotential DFT (LDA), static (0 K)
- Sample
- static LDA calculation, 20-atom unit cell
Source
- Paper
- Elasticity of (Mg,Fe)SiO3‐perovskite at high pressures
- Authors
- Boris Kiefer; Lars Stixrude; Renata M. Wentzcovitch
- DOI
- 10.1029/2002gl014683
- Year
- 2002
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The values for K0 and K'0 are consistent with the values derived from the equation of state V0 = 159.6 Å^3, K0 = 264.3 GPa, K'0 = 3.94 ... for x = 0
Additional notes
notes
Static (0 K) LDA calculation; LDA predicts static zero pressure volume for x=0 to be 1.7% smaller than experimental value at ambient conditions.