KAgO2
Potassium silver oxide is a complex inorganic compound containing silver in a high oxidation state. It is primarily studied for its role in advanced electrochemical systems and as a precursor in specialized chemical synthesis.
AgKO
Overview
Key Properties
Cross-validated computational properties for KAgO2, 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.
0.62–1.19 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.
15
3 databases, 3 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for KAgO2, 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 | 0.97 | 0.0000 | -4.489 | 3.98 |
| C2/c (No. 15) | monoclinic | 1.19 | 0.0163 | -4.472 | 3.78 |
| Pmmm (No. 47) | orthorhombic | 0.62 | 0.0261 | -4.462 | 4.41 |
| C2/c (No. 15) | Monoclinic | — | — | — | 3.55 |
| C2/c (No. 15) | Monoclinic | — | — | — | 3.79 |
| C2/c (No. 15) | Monoclinic | — | — | — | 3.68 |
| C2/c (No. 15) | — | — | — | — | — |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 4.41 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 4.58 |
| Cmcm (No. 63) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 4.74 |
Uses
Applications
Where KAgO2 is used.
Electrochemical researchChemical synthesisBattery development
Reference
Frequently Asked Questions
Common questions about KAgO2, answered from cross-validated data.
What is KAgO2?
Potassium silver oxide is a complex inorganic compound containing silver in a high oxidation state. It is primarily studied for its role in advanced electrochemical systems and as a precursor in specialized chemical synthesis.
More questions
What is KAgO2 used for?
KAgO2 is used in electrochemical research, chemical synthesis, and battery development.
What is the band gap of KAgO2?
KAgO2 has a DFT-computed band gap of 0.62–1.19 eV across 15 reported structures.
Is KAgO2 a metal, semiconductor, or insulator?
With a band gap up to 1.19 eV it is a semiconductor.
Is KAgO2 thermodynamically stable?
Yes — KAgO2 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of KAgO2?
The lowest-energy reported polymorph of KAgO2 is orthorhombic symmetry, space group Cmcm (No. 63).
What is the density of KAgO2?
The computed density of the ground-state structure of KAgO2 is 3.98 g/cm³.
How many polymorphs of KAgO2 are known?
15 structures of KAgO2 are reported across 3 databases, spanning 3 distinct space groups.
What elements does KAgO2 contain?
KAgO2 contains Ag, K, and O (3 elements).
Where does the data for KAgO2 come from?
KAgO2 data is cross-referenced from materials_project, mpaloe, jarvis.
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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