Phase D
20.7 wt% MgO, 44.5 wt% SiO2, 18.8 wt% Al2O3, ~16.0 wt% H2O (EDS)
finite strain (unspecified form) · Original · 2020
Why this differs from similar rows?
Table 1 finite strain (pressure-scale-free) fit over 0-21 GPa at 300 K only, V0 fixed; sibling rows fit the same form over the wider 0-23 GPa/300-900 K range with different parameters fixed vs free.
V₀
86.71
ų
Unit cell
K₀
144
GPa
Adiabatic
K′
5.500
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 86.71 | 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 |
|---|---|
| MgO | 0.8968 |
| Al2O3 | 0.322 |
| SiO2 | 1.2932 |
| H2O | 1.5508 |
Formula: 20.7 wt% MgO, 44.5 wt% SiO2, 18.8 wt% Al2O3, ~16.0 wt% H2O (EDS)
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- other / unspecified
- Method
- experiment (Brillouin / ultrasonic / elasticity)ultrasonic velocity and density measurements, pressure-scale-free fit (Li & Liebermann, 2014)
- Sample
- Al-PhD, Table 1, finite strain EoS, 0-21 GPa/300 K
Source
- Paper
- Sound Velocities of Al‐Bearing Phase D up to 22 GPa and 1300 K
- Authors
- Chaowen Xu; Steeve Gréaux; Toru Inoue; Masamichi Noda; Wei Sun; H. Kuwahara; Yuji Higo
- DOI
- 10.1029/2020gl088877
- Year
- 2020
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: Finite strain EoS (P-scale free): Al-PhD, 0-21 GPa/300 K, V0 = 86.71a, K = 144 (5), K' = 5.5 (5), G0 = 106 (3), ∂G/∂P = 2.4 (1)
Additional notes
G0
106 (3) GPa
dG dP
2.4 (1)
V0 fixed
True