Bridgmanite

MgSiO3

Birch-Murnaghan (order unspecified) · Original · 2000

Why this differs from similar rows?

Table 3 fit (1): this study's data plus Fiquet et al. [1998], 63 data points, V0 fixed to 162.3; sibling fit (2) uses a different combined literature data set (213 points).

V₀

162.3

Å³

Unit cell

K₀

259.500

GPa

Isothermal

K′

3.690

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
162.3	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: —
P_ref: —
Structure: orthorhombic perovskite (Pbnm/Pnma)
Method: experiment (XRD / DAC / multianvil compression)
P-V-T inversion of synchrotron X-ray diffraction data (laser-heated diamond-anvil cell), generalized least squares of Tarantola and Valette [1982]
Sample: Table 3 fit (1): this study data + Fiquet et al. [1998], 63 data points

Source

Paper: Thermoelastic properties and crystal structure of MgSiO3 perovskite at lower ma…
Authors: G. Fiquet; Agnès Dewaele; D. Andrault; Martin Kunz; Thierry Le Bihan
DOI: 10.1029/1999gl008397
Year: 2000
Journal: Geophysical Research Letters
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

Table 3: V0 (Å3) 162.3 (fixed); K0,T (GPa) 259.5 (9); K'0,T 3.69 (4); (∂K/∂T)P (GPaK-1) -0.017 (2); α0 (10-5 K-1) 2.18 (12); α1 (10-8 K-2) 0.11 (8). 'errors on parameters were calculated ... and molar volume V0 fixed to 162.3 Å3'

Additional notes

dK dT P

-0.017 (2) GPaK-1

alpha0

2.18 (12) x10-5 K-1

alpha1

0.11 (8) x10-8 K-2

data sets

optimized from data set presented in Table 1 and that of Fiquet et al. [1998], 63 data points