Bridgmanite
MgSiO3 with 5 mol% Al2O3
third-order Birch-Murnaghan · Original · 1999
Why this differs from similar rows?
Table 3, Run 1 of the in situ P-V-T XRD experiment; ambient V0 fixed to the measured Run 1 unit-cell volume (163.051 A3), distinct from Runs 2 and 3.
V₀
163.051
ų
Unit cell
K₀
234
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 163.051 | 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-T X-ray diffraction (multi-anvil press, NaCl medium)
- Sample
- Al-Pv, Run 1
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 1: K_{0,T} = 234(2) 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 1 (beginning of run): V = 163.051(69) ų.
Additional notes
dKT dT GPa per K HT BM
-0.055(10)
dKT dT GPa per K isothermal PV
-0.057(5)
alpha0 x1e5
2.08(26)
alpha1 x1e8
2.21(67)
beta a x1e3 GPa-1
1.42(2)
beta b x1e3 GPa-1
1.24(1)
beta c x1e3 GPa-1
1.37(2)
V0 note
Table 1 also lists end-of-run volume 163.126(61) ų for Run 1; V0 was fixed to measured ambient value in the fit