Bridgmanite
MgSiO3
unknown · Cited · 1993
V₀
162.75
ų
Unit cell
K₀
260
GPa
Unknown
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.75 | 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)high pressure and high temperature in situ X-ray diffraction (Drickamer-type apparatus with synchrotron radiation); pressure calculated from perovskite unit-cell volume using cited EOS parameters
- Sample
- perovskite synthesized in situ from enstatite powder
Source
- Paper
- High pressure and high temperature in situ X‐ray observation of MgSiO3 Perovski…
- Authors
- Nobumasa Funamori; Takehiko Yagi
- DOI
- 10.1029/92gl02960
- Year
- 1993
- Journal
- Geophysical Research Letters
- Origin
- Cited (quoted from earlier work)
Evidence from the paper
The pressure at room temperature was calculated to be 36.4 GPa from the observed unit cell volume of perovskite (145.51 ų) using following parameters: V0=162.75 ų, K0=260 GPa, and (dK/dP)0=4 [Yagi et al., 1982].
Additional notes
cited reference
Yagi et al. [1982]
observed unit cell volume at 36.4 GPa
145.51 ų
thermal expansivity this study
≥1.7(2) x 10^-5 /K at 36 GPa and 300 K
note
EOS parameters used to estimate pressure from perovskite unit-cell volume; EOS functional form not explicitly stated in this paper