Corundum
Al2O3
third-order Birch-Murnaghan · Original · 2022
Why this differs from similar rows?
Table 1 'This study' preferred model with theta_D0 fixed to 1,100 K (same as Table 2 Model 3); sibling Table 2 rows fix theta_D0 to different values (500 K, 800 K), changing the fitted K_T0.
V₀
255.1
ų
Unit cell
K₀
246
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 255.1 | ų | Unit cell | — |
Reported value and unit are preserved as extracted. Z (formula units per cell) is not stored yet, so molar ↔ ų/f.u. conversion is not applied automatically.
Composition
| Oxide | Molar |
|---|---|
| Al2O3 | 1 |
Formula: Al2O3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- corundum
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron X-ray diffraction in laser-heated diamond anvil cells, Pt/NaCl pressure calibrants (Fei et al., 2007)
- Sample
- Table 1, This study; corundum powder (99.9% purity) mixed with 7.5 wt% Pt
Source
- Paper
- Thermal Equations of State of Corundum and Rh2O3 (II)‐Type Al2O3 up to 153 GPa …
- Authors
- Weigang Shi; Wei Wei; Ningyu Sun; Zhu Mao; Vitali B. Prakapenka
- DOI
- 10.1029/2021jb023805
- Year
- 2022
- Journal
- Journal of Geophysical Research Solid Earth
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: Corundum, This study: KT0 = 246(2) GPa, KT0' = 4(fixed), V0 = 255.1(fixed) Å3, θD0 = 1,100(fixed) K, γ0 = 1.32(7), q = 0.8(4). Footnote a: 'Ambient volume of corundum from Lutterotti and Scardi (1990).'
Additional notes
theta D0 K
1,100(fixed)
gamma 0
1.32(7)
q
0.8(4)
V0 source
fixed to ambient volume from Lutterotti and Scardi (1990)
lower mantle framing
thermal EoS determined up to 153 GPa and 3400 K for lower-mantle modeling