Bridgmanite
MgSiO3
third-order Birch-Murnaghan · Original · 2021
Why this differs from similar rows?
Adiabatic bulk modulus computed using the Voigt bound (KSV) from the global elastic-moduli fit; sibling row instead reports the Reuss bound (KSR), giving a slightly different value.
V₀
—
Unknown basis
K₀
257.100
GPa
Adiabatic
K′
3.710
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| — | — | Unknown basis | — |
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 (Brillouin / ultrasonic / elasticity)high-pressure Brillouin scattering + single-crystal X-ray diffraction in DAC (global fit, Voigt bound)
- Sample
- single crystals synthesized at 25 GPa and 1573 K (multianvil LVP)
Source
- Paper
- Single‐Crystal Elasticity of MgSiO3 Bridgmanite to Mid‐Lower Mantle Pressure
- Authors
- Giacomo Criniti; Alexander Kurnosov; Tiziana Boffa Ballaran; D. J. Frost
- DOI
- 10.1029/2020jb020967
- Year
- 2021
- Journal
- Journal of Geophysical Research Solid Earth
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
we calculate the pressure dependence of the adiabatic bulk modulus, K_S0 = 257.1(6) GPa, K'_S0 = 3.71(4), and of the shear modulus, G_0 = 175.6(2) GPa, G'_0 = 1.86(1). Table 2: KSV Order 3, M0 (GPa) 257.1(6), M0' 3.71(4), M0'' (GPa−1) −0.014, P range 0–78.8 GPa.
Additional notes
M0 second derivative GPa-1
−0.014 (implied from third-order truncation)
G0 GPa
175.6(2)
Gp0
1.86(1)
P range GPa
0–78.8