Bridgmanite
MgSiO3 + 5 mol% Al2O3 (Al.05-pv)
Birch-Murnaghan (order unspecified) · Original · 2004
V₀
—
Unknown basis
K₀
259
GPa
Isothermal
K′
—
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| — | — | Unknown basis | — |
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: MgSiO3Al.05
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)static compression, synchrotron X-ray diffraction in diamond anvil cell, ruby pressure scale over full range
- Sample
- same sample, alternative fit using ruby pressure scale throughout the pressure range
Source
- Paper
- Effect of aluminium on the compressibility of silicate perovskite
- Authors
- I. M. Daniel; Jay D. Bass; G. Fiquet; Hervé Cardon; Jianzhong Zhang; Michael Hanfland
- DOI
- 10.1029/2004gl020213
- Year
- 2004
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
For example, use of the ruby pressure scale throughout the experimental pressure range would have led to a K_T0 value as high as 259(4) GPa, slightly higher than for Mg-pv and hence drastically changing our conclusions.
Additional notes
note
hypothetical/alternative fit illustrating pressure-scale sensitivity; preferred fit uses neon pressure scale above 25 GPa