Bridgmanite
MgSiO3 (x = 0.0)
Birch-Murnaghan (order unspecified) · Original · 1991
V₀
162.49
ų
Unit cell
K₀
261
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.49 | 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
- 298 K
- Pref
- —
- Structure
- other / unspecified
- Method
- experiment (XRD / DAC / multianvil compression)monochromatic synchrotron X ray powder diffraction in externally heated diamond-anvil cell, neon pressure medium
- Sample
- polycrystalline aggregate synthesized by laser heating at 40 GPa in diamond-anvil cell
Source
- Paper
- Effect of pressure, temperature, and composition on lattice parameters and dens…
- Authors
- Ho‐kwang Mao; R. J. Hemley; Ying‐heng Fei; Jinfu Shu; L. C. Chen; A. P. Jephcoat; Yan Wu; William A. Bassett
- DOI
- 10.1029/91jb00176
- Year
- 1991
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: x=0.0, V0 = 162.49(7) ų. 'The 298-K isothermal equations of state of the three perovskites are indistinguishable... The zero-pressure bulk modulus KT0 = 261(±4) GPa with its pressure derivative KT0' = 4.' Table 4 row (6): 261 GPa, 4, x = 0, 0.1, 0.2, the present study.
Additional notes
a0
4.7782(10) Å
b0
4.9295(8) Å
c0
6.8984(18) Å
rho0
4.1041(15) gm/cm3 (natural isotopic abundance of Fe)
note
Least squares BM fit was performed on the x=0.1 data; compressibilities of x=0, 0.1, 0.2 indistinguishable