Phase D
20.7 wt% MgO, 44.5 wt% SiO2, 18.8 wt% Al2O3, ~16.0 wt% H2O (EDS)
Birch-Murnaghan (order unspecified) · Original · 2020
Why this differs from similar rows?
Table 1 row where K (=143) is fixed alongside V0 ('the value was fixed when calculated') and only K' (5.85) and thermal terms are fitted; sibling row instead lets K float (=142, K'=6.0).
V₀
86.71
ų
Unit cell
K₀
143
GPa
Isothermal
K′
5.850
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)in situ synchrotron X-ray diffraction with ultrasonic measurements in Kawai-type multianvil apparatus (Gold P-scale, Tsuchiya, 2003)
- Sample
- Al-PhD, Table 1, Birch-Murnaghan EoS, 0-23 GPa/300-900 K (row with K0 fixed)
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: Al-PhD, 0-23 GPa/300-900 K, V0 = 86.71a, K = 143a, K' = 5.85 (4), ∂K/∂T = -0.023(6), a = 3.5 (3) × 10^-5 K^-1, b = 0.9 (5) × 10^-8 K^-2. 'aThe value was fixed when calculated.'
Additional notes
P T range
0-23 GPa/300-900 K
dK dT
-0.023(6) GPa K^-1
a
3.5 (3) × 10^-5 K^-1
b
0.9 (5) × 10^-8 K^-2
V0 fixed
True
K0 fixed
True