Bridgmanite
MgSiO3
third-order Birch-Murnaghan · Original · 1996
Why this differs from similar rows?
From run 2 (enstatite single crystals, flux method); V0 was fitted per run while K0 and K' were fixed to Mao et al. [1991] values, so only V0 differs from sibling run 1.
V₀
162.19
ų
Unit cell
K₀
261
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.19 | 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 energy-dispersive X-ray diffraction, MA8-type multianvil with sintered diamond anvils, synchrotron radiation, 21-29 GPa, 300-2000 K
- Sample
- run 2 (synthesized from enstatite single crystals, flux method)
Source
- Paper
- Thermoelastic properties of MgSiO3 perovskite determined by in situ X ray obser…
- Authors
- Nobumasa Funamori; Takehiko Yagi; Wataru Utsumi; Tadashi Kondo; Takeyuki Uchida; Miho Funamori
- DOI
- 10.1029/95jb03732
- Year
- 1996
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The V0 of run 1 and run 2 was 162.32 Å3 and 162.19 Å3, respectively. ... we assume that K300,0 = 261 GPa, K'300,0 = 4, and α300,0 = 1.7 x 10-5 K-1 in the least squares fitting.
Additional notes
dK dT P
-0.0280(±0.0032) GPa/K (fitted)
note
all volume data were normalized by the V0 of each run; V/V0 was used for the analyses
pressure marker run2
MgO