Phase D
20.7 wt% MgO, 44.5 wt% SiO2, 18.8 wt% Al2O3, ~16.0 wt% H2O (EDS)
unknown · Original · 2020
Why this differs from similar rows?
Table 1 2-D linear fit over 0-21 GPa at 300 K only; sibling row fits the same model over a wider range (0-23 GPa, 300-900 K) that adds a temperature dependence.
V₀
—
Unknown basis
K₀
148
GPa
Adiabatic
K′
4.700
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 ↔ 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 (Gold P-scale, Tsuchiya, 2003)
- Sample
- Al-PhD, Table 1, 2-D linear fit, 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: 2-D linear (Gold P-scale, Tsuchiya, 2003): Al-PhD, 0-21 GPa/300 K, K = 148 (2), K' = 4.7 (1), G0 = 107 (2), ∂G/∂P = 2.0 (1)
Additional notes
G0
107 (2) GPa
dG dP
2.0 (1)