Bridgmanite
MgSiO3 with 5 mol% Al2O3
third-order Birch-Murnaghan · Original · 1999
Why this differs from similar rows?
Table 3, Run 2 of the in situ P-V-T XRD experiment; ambient V0 fixed to the measured Run 2 unit-cell volume (163.184 A3), distinct from Runs 1 and 3.
V₀
163.184
ų
Unit cell
K₀
232
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 163.184 | 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
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)in situ P-V X-ray diffraction (multi-anvil press, NaCl medium)
- Sample
- Al-Pv, Run 2
Source
- Paper
- Thermal Equation of State of Aluminum-Enriched Silicate Perovskite
- Authors
- Jianzhong Zhang; Donald J. Weidner
- DOI
- 10.1126/science.284.5415.782
- Year
- 1999
- Journal
- Science
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 3: Al-Pv Run 2: K_{0,T} = 232(1) GPa; 'In all studies, the pressure derivative, K_0', is fixed at 4. Ambient unit-cell volume, V_0, was fixed in the data reduction of this study.' Table 1, Run 2 (beginning of run): V = 163.184(76) ų.
Additional notes
beta a x1e3 GPa-1
1.40(2)
beta b x1e3 GPa-1
1.19(2)
beta c x1e3 GPa-1
1.45(3)
V0 note
Table 1 also lists end-of-run volume 163.202(92) ų for Run 2; text quotes K_{0,T} range 232(2) to 236(2) GPa