Ag4K4O4
Ag4K4O4 is a thermodynamically stable semiconducting compound containing silver, potassium, and oxygen.
About Ag4K4O4
Ag4K4O4 is a complex inorganic compound composed of silver, potassium, and oxygen. As a thermodynamically stable material located on the convex hull, it represents a well-defined structural arrangement that maintains integrity under standard conditions.
This compound exhibits semiconducting electronic character, making it a subject of interest for researchers investigating electronic and optical properties in mixed-metal oxides. Its existence across multiple databases highlights its significance as a distinct phase in solid-state chemistry.
Key Properties
Cross-validated computational properties for Ag4K4O4, 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 Ag4K4O4, 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. |
|---|---|---|---|---|---|
| I4/mmm (No. 139) | tetragonal | 1.49 | 0.0000 | -4.001 | 4.10 |
| F-43m (No. 216) | cubic | 0.00 | 0.4488 | -3.553 | 4.68 |
| — | — | — | — | — | 3.58 |
| I4/m (No. 87) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
Applications
Where Ag4K4O4 is used.
Frequently Asked Questions
Common questions about Ag4K4O4, answered from cross-validated data.
What is Ag4K4O4?
Ag4K4O4 is a thermodynamically stable semiconducting compound containing silver, potassium, and oxygen.
What is Ag4K4O4 used for?
What is the band gap of Ag4K4O4?
Is Ag4K4O4 a metal, semiconductor, or insulator?
Is Ag4K4O4 thermodynamically stable?
What is the crystal structure of Ag4K4O4?
What is the density of Ag4K4O4?
How many polymorphs of Ag4K4O4 are known?
What elements does Ag4K4O4 contain?
Where does the data for Ag4K4O4 come from?
How It Compares
As a unique inorganic phase, Ag4K4O4 occupies a specialized niche in materials science. Unlike more common binary oxides, this quaternary compound demonstrates the structural complexity possible when combining noble metals with alkali metals and oxygen, serving as a benchmark for stability in its specific compositional space.
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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