Wüstite

FeO (sample confirmed as Fe0.92O)

unknown · Cited · 2020

V₀

12.256

cm³/mol

Molar

K₀

149.400

GPa

Isothermal

K′

3.600

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
12.256	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
FeO	1

Formula: FeO

Conditions & method

T_ref: 300 K
P_ref: —
Structure: B1 rocksalt (Fm-3m)
Method: experiment (XRD / DAC / multianvil compression)
X-ray diffraction (pressure determination via EOS of B1-FeO); parameters compiled from literature
Sample: wüstite powder made from reduction of hematite

Source

Paper: The sound velocity of wüstite at high pressures: implications for low-velocity …
Authors: Ryosuke Tanaka; Tatsuya Sakamaki; Eiji Ohtani; Hiroshi Fukui; Seiji Kamada; Akio Suzuki; Satoshi Tsutsui; Hiroshi Uchiyama; Alfred Q. R. Baron
DOI: 10.1186/s40645-020-00333-3
Year: 2020
Journal: Progress in Earth and Planetary Science
Origin: Cited (quoted from earlier work)

Evidence from the paper

The experimental pressure was determined using the unit cell volume of wüstite determined via XRD and its equation of state (McCammon and Liu 1984; Stixrude and Lithgow-Bertelloni 2007; Fischer et al. 2011). The parameters used for the equation of state of B1-FeO are summarized in Table 1. Table 1: V0 [cm3/mol] 12.256a; K0 [GPa] 149.4 (10)b; K0′ 3.60 (4)b; θ0 417c; γ0 1.41 (5)b; q 0.5b. a McCammon and Liu (1984); b Fischer et al. (2011); c Stixrude and Lithgow-Bertelloni (2007).

Additional notes

theta0 K

417 (Stixrude and Lithgow-Bertelloni 2007)

gamma0

1.41 (5) (Fischer et al. 2011)

0.5 (Fischer et al. 2011)

V0 source

McCammon and Liu (1984)

K0 Kp source

Fischer et al. (2011)

thermal expansion used

α = α0(V/V0)^ξ with α0 = 4.22 × 10^-5 K^-1, V0 = 84.75 Å3, ξ = 6.0 (Seagle et al. 2008)

usage

EOS used for pressure determination and for calculating KT/KS in Vs derivation in this IXS study up to 112.3 GPa and 1700 K