Bridgmanite
MgSiO3
third-order Birch-Murnaghan · Original · 2000
V₀
162.27
ų
Unit cell
K₀
253
GPa
Isothermal
K′
3.900
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.27 | 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
- experiment (XRD / DAC / multianvil compression)angle-dispersive synchrotron X-ray diffraction in laser-heated diamond-anvil cell
- Sample
- synthesized from synthetic MgSiO3 enstatite and MgSiO3 glass, Pt internal calibrant
Source
- Paper
- Thermoelastic properties and crystal structure of MgSiO3 perovskite at lower ma…
- Authors
- G. Fiquet; Agnès Dewaele; D. Andrault; Martin Kunz; Thierry Le Bihan
- DOI
- 10.1029/1999gl008397
- Year
- 2000
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The fit to a Birch-Murnaghan equation of state truncated to 3rd order yields a bulk modulus K0 of 253(9) GPa, a pressure derivative K'0=3.9(2) and a room-pressure molar volume V0=162.27(1) Å3.
Additional notes
note
room-temperature EOS defined by volume data recorded at room temperature after laser heating; text labels V0 as 'molar volume' but reports it in Å3 (unit-cell scale, Z=4)