Bridgmanite

(Mg,Fe)SiO3 (spanning MgSiO3 to (Mg0.8Fe0.2)SiO3)

unknown · Cited · 1994

V₀

—

Unknown basis

K₀

263

GPa

Isothermal

K′

3.900

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

(Mg,Fe)SiO3

Reported as: (Mg,Fe)SiO3 (spanning MgSiO3 to (Mg0.8Fe0.2)SiO3)

Conditions & method

T_ref: 300 K
P_ref: —
Structure: perovskite (unspecified)
Method: experiment (Brillouin / ultrasonic / elasticity)
compilation of static compression (hydrostatic and nonhydrostatic to 10-100 GPa) and Brillouin spectroscopy
Sample: Table 1: Thermoelastic Properties of (Mg,Fe)SiO3 Perovskite (compiled best estimates)

Source

Paper: Thermoelasticity of perovskite: An emerging consensus
Authors: Raymond Jeanloz; Russell J. Hemley
DOI: 10.1029/94eo01093
Year: 1994
Journal: Eos
Origin: Cited (quoted from earlier work)

Evidence from the paper

Table 1. Thermoelastic Properties of (Mg,Fe)SiO3 Perovskite: 'Isothermal Bulk Modulus K0T 263(±3.0) GPa [refs 1-4]; Pressure Derivative K'0 3.9 (±0.5) [refs 2,3]'. Text: 'it is the highest-pressure static-compression measurements that constrain the pressure derivative K'0 (Table 1), given that the value of K0 is verified independently by the Brillouin data.'

Additional notes

shear modulus mu0

177(±2.0) GPa (ref 4, Weidner et al. [1993])

alpha0 P0 T300K

2.0 (±0.5) x 10^-5 K^-1 (refs 5,6)

alpha P0 T800-1200K

4.0 (±1.5) x 10^-5 K^-1 (refs 3-5, 7)

alpha P20-30GPa T1500K

2.0 (±0.5) x 10^-5 K^-1 (refs 3-5, 7, 8)

K0 references

Yagi et al. [1982]; Knittle and Jeanloz [1987]; Mao et al. [1991]; Weidner et al. [1993]

Kp references

Knittle and Jeanloz [1987]; Mao et al. [1991]

notes

Error bounds reflect both the range of reported values and estimated experimental uncertainties in individual studies; no systematic effect of Fe content on K0 discovered; no V0 reported in the table