Bridgmanite
(Fe0.1Mg0.9)SiO3 (x = 0.1)
Birch-Murnaghan (order unspecified) · Original · 1991
V₀
162.79
ų
Unit cell
K₀
261
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 162.79 | 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 | 0.9 |
| FeO | 0.1 |
| SiO2 | 1 |
Formula: (Mg0.9Fe0.1)SiO3
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=0.1, V0 = 162.79(8) ų. 'The data of (Fe0.1Mg0.9)SiO3 perovskite were used for a least squares fit of a Birch-Murnaghan equation of state... The least squares fitting yielded KT0 = 261(±4) GPa with KT0' = 4.'
Additional notes
a0
4.7816(14) Å
b0
4.9307(10) Å
c0
6.9049(16) Å
rho0
4.2250(20) gm/cm3 (natural isotopic abundance of Fe)
dKT dT fit A
-8.0(±0.5)x10-2 GPa/K
dKT dT fit B
-6.3(±0.5)x10-2 GPa/K
delta T
6.5-7.5
linear compressibilities
beta_a0 = 0.00134(3) GPa-1, beta_b0 = 0.00108(2) GPa-1, beta_c0 = 0.00143(2) GPa-1 (Murnaghan axial fits)
pressure scale
gold (Anderson et al., 1989); ruby R1; neon