NaAlF4
sodium tetrafluoroaluminate · chiolite, sodium aluminum fluoride
Sodium tetrafluoroaluminate is an inorganic compound often utilized as a flux in metallurgical processes. It helps lower the melting point of materials and facilitates the removal of impurities during metal refining and casting.
Key Properties
Cross-validated computational properties for sodium tetrafluoroaluminate, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Reported Structures
Lowest-energy structures reported for NaAlF4, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| Cmcm (No. 63) | orthorhombic | 6.68 | 0.0024 | -7.408 | 2.98 |
| P4/mmm (No. 123) | tetragonal | 5.78 | 0.1040 | -7.306 | 2.59 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 2.59 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 2.72 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 2.94 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 2.99 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 2.84 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 2.68 |
| Cmcm (No. 63) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
Applications
Where sodium tetrafluoroaluminate is used.
Frequently Asked Questions
Common questions about sodium tetrafluoroaluminate, answered from cross-validated data.
What is NaAlF4?
Sodium tetrafluoroaluminate is an inorganic compound often utilized as a flux in metallurgical processes. It helps lower the melting point of materials and facilitates the removal of impurities during metal refining and casting.
What is NaAlF4 used for?
What is the band gap of NaAlF4?
Is NaAlF4 a metal, semiconductor, or insulator?
Is NaAlF4 thermodynamically stable?
What is the crystal structure of NaAlF4?
What is the density of NaAlF4?
How many polymorphs of NaAlF4 are known?
What elements does NaAlF4 contain?
Where does the data for NaAlF4 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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