Post-perovskite

MgSiO3

Birch-Murnaghan (order unspecified) · Original · 2015

V₀

24.2

cm³/mol

Molar

K₀

253.700

GPa

Isothermal

K′

4.030

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
24.2	cm³/mol	Molar	—

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: 298.2 K
P_ref: 0.000 GPa
Structure: post-perovskite (CaIrO3-type, Cmcm)
Method: unknown
fit to P–V–T measurements (Guignot et al., 2007; Komabayashi et al., 2008; Ono et al., 2006); Prv EOS parameters used as initial approximation due to lack of ambient heat-capacity data
Sample: Table 1, Postperovskite column

Source

Paper: The equations of state of forsterite, wadsleyite, ringwoodite, akimotoite, MgSi…
Authors: Peter I. Dorogokupets; А. M. Dymshits; T. S. Sokolova; B. S. Danilov; Konstantin D. Litasov
DOI: 10.1016/j.rgg.2015.01.011
Year: 2015
Journal: Russian Geology and Geophysics
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

Table 1. Postperovskite: V0, cm3/mol = 24.2; K0, GPa = 253.7; K′ = 4.03; k = 5. 'For lack of measurements of the heat capacity of PPrv at ambient pressure, the parameters of the equation of state for Prv were used as the initial approximation. The obtained equation of state for PPrv (Table 1) ensures a good smoothing of the P–V–T measurements from (Guignot et al., 2007; Komabayashi et al., 2008).'

Additional notes

U0 kJ per mol

-1447.9

theta01 K

7.5

theta02 K

7.5

gamma0

1.67

beta

2.22

gamma inf