Al4F18K4O4
Al4F18K4O4 is a semiconducting inorganic compound containing aluminum, fluorine, potassium, and oxygen that exists in a metastable state.
About Al4F18K4O4
Al4F18K4O4 is a complex inorganic compound composed of aluminum, fluorine, potassium, and oxygen. As a semiconducting material, it represents a specialized chemical system that bridges traditional ionic and covalent bonding characteristics within its crystal lattice.
Due to its position relative to the thermodynamic ground state, this compound is considered metastable. Its existence within material databases highlights the ongoing scientific interest in exploring synthetic pathways for complex oxyfluoride frameworks.
Key Properties
Cross-validated computational properties for Al4F18K4O4, aggregated across 2 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 Al4F18K4O4, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 0.19 | 0.2801 | -5.146 | 2.39 |
| — | — | — | — | — | 2.54 |
| — | — | — | — | — | 2.54 |
Patent Landscape
3 patents reference Al4F18K4O4 or close compositional variants.
| Patent | Title | Assignee | Granted |
|---|---|---|---|
| 8248032 | Charging system for prioritizing load consumption in a notebook computer | — | — |
| 8263193 | Vacuum treatment method | — | — |
| 8268035 | Process for producing refractory metal alloy powders | — | — |
Frequently Asked Questions
Common questions about Al4F18K4O4, answered from cross-validated data.
What is Al4F18K4O4?
Al4F18K4O4 is a semiconducting inorganic compound containing aluminum, fluorine, potassium, and oxygen that exists in a metastable state.
What is the band gap of Al4F18K4O4?
Is Al4F18K4O4 a metal, semiconductor, or insulator?
Is Al4F18K4O4 thermodynamically stable?
What is the crystal structure of Al4F18K4O4?
What is the density of Al4F18K4O4?
How many polymorphs of Al4F18K4O4 are known?
What elements does Al4F18K4O4 contain?
Where does the data for Al4F18K4O4 come from?
How It Compares
As a unique inorganic phase, Al4F18K4O4 occupies a distinct niche in materials research. Without direct structural analogs in its immediate class, it serves as an important reference point for understanding how aluminum-fluorine-oxygen networks can be stabilized in the presence of alkali metal cations.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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