Bridgmanite

MgSiO3

third-order Birch-Murnaghan · Original · 2012

Why this differs from similar rows?

Table 2 third-order Birch-Murnaghan fit with KT0/K'T0 free, V0 fixed to Tange et al. [2009b]; sibling row is an alternative fit constrained by an external KS0 = 253 GPa.

V₀

162.373

Å³

Unit cell

K₀

256.700

GPa

Isothermal

K′

4.090

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
162.373	Å³	Unit cell	—

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: 300 K
P_ref: —
Structure: perovskite (unspecified)
Method: experiment (XRD / DAC / multianvil compression)
in situ synchrotron XRD (SDMA and LHDAC), P-V-T up to 110 GPa and 2500 K; MgO pressure scale
Sample: synthesized from Mg2SiO4 olivine powder at high P,T

Source

Paper: P‐V‐T equation of state of MgSiO3 perovskite based on the MgO pressure scale: A…
Authors: Yoshinori Tange; Yasuhiro Kuwayama; Tetsuo Irifune; Ken‐ichi Funakoshi; Yasuo Ohishi
DOI: 10.1029/2011jb008988
Year: 2012
Journal: Journal of Geophysical Research Atmospheres
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

Table 2. EOS Parameters of MgSiO3 Perovskite and MgO in the MGD Model: Third-Order Birch-Murnaghan, MgSiO3 Perovskite: V0 (Å3) 162.373 (fixed); KT0 (GPa) 256.7(15); K'T0 4.09(6); Θ0 (K) 950(150); γ0 1.54(9); a 1; b 1.5(3).

Additional notes

Theta0 K

950(150)

gamma0

1.54(9)

1.5(3)

V0 source

fixed to value determined by Tange et al. [2009b]

K S0 derived GPa

259.0