Bridgmanite

MgSiO3 (x = 0)

third-order Birch-Murnaghan · Original · 2002

Why this differs from similar rows?

Table 1 value from third-order Eulerian strain fits to elastic constants, VRH-averaged (K=263, K'=4.06); sibling row instead reports the volumetric EOS fit (K0=264.3, K'=3.94).

V₀

—

Unknown basis

K₀

263

GPa

Unknown

K′

4.060

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 ↔ Å³/f.u. conversion is not applied automatically.

Composition

Oxide	Molar
MgO	1
SiO2	1

Formula: MgSiO3

Conditions & method

T_ref: —
P_ref: —
Structure: orthorhombic perovskite (Pbnm/Pnma)
Method: first-principles DFT / ab initio
first-principles plane-wave pseudopotential DFT (LDA), static (0 K)
Sample: Table 1, this work (x = 0), Voigt-Reuss-Hill average

Source

Paper: Elasticity of (Mg,Fe)SiO3‐perovskite at high pressures
Authors: Boris Kiefer; Lars Stixrude; Renata M. Wentzcovitch
DOI: 10.1029/2002gl014683
Year: 2002
Journal: Geophysical Research Letters
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

Table 1: M0^a (This work, x = 0): K = 263, M'0 = 4.06; The pressure dependence of the elastic constants was obtained from third order eulerian strain fits [Davies, 1974]. Isotropic bulk (K) and shear moduli (G) ... were calculated as Voigt-Reuss-Hill averages.

Additional notes

G0 GPa

1.7

notes

VRH-averaged elastic moduli at zero pressure, consistent with EOS-derived K0 = 264.3 GPa, K'0 = 3.94.