F28K8Nb4
This inorganic compound is a complex fluoride salt containing potassium and niobium. It is primarily utilized in specialized chemical synthesis and materials research involving niobium-based compounds.
FKNb
Overview
Key Properties
Cross-validated computational properties for F28K8Nb4, 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.
4.53 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
3
3 databases, 1 space group
Crystallography
Reported Structures
Lowest-energy structures reported for F28K8Nb4, 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 | 4.53 | 0.0000 | -5.947 | 3.25 |
| P21/c (No. 14) | — | — | — | — | — |
| — | — | — | — | — | 2.65 |
Uses
Applications
Where F28K8Nb4 is used.
Chemical synthesisMaterials science researchPrecursor for niobium-based materials
Reference
Frequently Asked Questions
Common questions about F28K8Nb4, answered from cross-validated data.
What is F28K8Nb4?
This inorganic compound is a complex fluoride salt containing potassium and niobium. It is primarily utilized in specialized chemical synthesis and materials research involving niobium-based compounds.
More questions
What is F28K8Nb4 used for?
F28K8Nb4 is used in chemical synthesis, materials science research, and precursor for niobium-based materials.
What is the band gap of F28K8Nb4?
F28K8Nb4 has a DFT-computed band gap of 4.53 eV across 3 reported structures.
Is F28K8Nb4 a metal, semiconductor, or insulator?
With a wide band gap up to 4.53 eV it is an insulator / wide-band-gap material.
Is F28K8Nb4 thermodynamically stable?
Yes — F28K8Nb4 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of F28K8Nb4?
The lowest-energy reported polymorph of F28K8Nb4 is monoclinic symmetry, space group P21/c (No. 14).
What is the density of F28K8Nb4?
The computed density of the ground-state structure of F28K8Nb4 is 3.25 g/cm³.
How many polymorphs of F28K8Nb4 are known?
3 structures of F28K8Nb4 are reported across 3 databases, spanning 1 distinct space group.
What elements does F28K8Nb4 contain?
F28K8Nb4 contains F, K, and Nb (3 elements).
Where does the data for F28K8Nb4 come from?
F28K8Nb4 data is cross-referenced from materials_project, aflow, omat24.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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