CF
Na0.88Al0.99Fe0.13Si0.94O4 (90% of Fe is Fe3+)
third-order Birch-Murnaghan · Original · 2023
V₀
244.2
ų
Unit cell
K₀
211
GPa
Isothermal
K′
2.600
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 244.2 | 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 |
|---|---|
| FeO | 0.013 |
| Fe2O3 | 0.0585 |
| Na2O | 0.44 |
| Al2O3 | 0.495 |
| SiO2 | 0.94 |
Formula: Na0.88Al0.99Fe0.13Si0.94O4
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 44 GPa
- Sample
- synthetic single crystal, run #5K2681 (25 GPa, 1600 °C multi-anvil), 57Fe-enriched
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
V0 = 244.2(2) Å3, KT0 = 211(6) GPa with K′T0 = 2.6(3) for Fe-bearing CF. Under ambient conditions, the measured V0 values are ... 244.0(2) Å3 for the ... Fe-bearing CF sample.
Additional notes
measured ambient V0
244.0(2) Å3
ambient lattice parameters
a = 10.189(2) Å, b = 8.686(7) Å, c = 2.7571(4) Å, V = 244.0(2) Å3
linear moduli a b c
158(11), 181(7), 306(16) GPa (linearized BM3)
Fe effect
Fetot = 0.13 pfu leads to 3.2 ± 1.9% reduction in bulk modulus vs. Fe-free sample
fitting software
EoSFit7c, error-weighted least squares