CF
Na0.93Al1.02Si1.00O4 (Fe-free)
third-order Birch-Murnaghan · Original · 2023
V₀
241.6
ų
Unit cell
K₀
220
GPa
Isothermal
K′
2.600
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 241.6 | 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 |
|---|---|
| Na2O | 0.465 |
| Al2O3 | 0.51 |
| SiO2 | 1 |
Formula: Na0.93Al1.02Si1.00O4
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron single-crystal X-ray diffraction in diamond-anvil cell (neon medium, Pt pressure calibration), up to 41.3 GPa
- Sample
- synthetic single crystal, run #5K2124 (25 GPa, 1600 °C multi-anvil)
Source
- Paper
- Crystal structure of calcium-ferrite type NaAlSiO4 up to 45 GPa
- Authors
- Fei Qin; Ye Wu; Shengchao Xue; Dongzhou Zhang; Xiang Wu; Steven D. Jacobsen
- DOI
- 10.2138/am-2022-8432
- Year
- 2023
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The best-fit, third-order Birch-Murnaghan EoS parameters yield V0 = 241.6(1) Å3, KT0 = 220(4) GPa, and K′T0 = 2.6(3) for Fe-free CF. Under ambient conditions, the measured V0 values are 241.5(1) ... Å3 for the Fe-free ... sample.
Additional notes
measured ambient V0
241.5(1) Å3
ambient lattice parameters
a = 10.166(1) Å, b = 8.675(9) Å, c = 2.7380(6) Å, V = 241.5(1) Å3
linear moduli a b c
158(5), 180(8), 338(9) GPa (linearized BM3)
polyhedral moduli
K0(NaO8) = 127 GPa, K0((Al,Si)O6) ~304 GPa, both with K0' fixed at 4
fitting software
EoSFit7c, error-weighted least squares