KNaO
KNaO is a semiconducting ternary oxide compound that is theoretically stable enough to be a target for laboratory synthesis.
About KNaO
KNaO is a ternary oxide composed of potassium, sodium, and oxygen. As a semiconducting material, it represents a unique intersection of alkali metal chemistry that warrants further investigation for its electronic potential. Given its near-hull thermodynamic stability, this compound is considered a promising candidate for experimental synthesis. Its structural diversity across multiple databases highlights its significance as a subject for computational materials discovery.
Key Properties
Cross-validated computational properties for KNaO, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of KNaO. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for KNaO, 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. |
|---|---|---|---|---|---|
| P4/nmm (No. 129) | tetragonal | 2.65 | 0.0070 | -1.337 | — |
| P4/nmm (No. 129) | tetragonal | 2.13 | 0.0149 | -3.789 | 2.68 |
| — | — | 2.63 | 0.0155 | -1.281 | — |
| — | — | 2.69 | 0.0259 | -1.270 | — |
| — | — | 2.63 | 0.0327 | -1.263 | — |
| — | — | 1.64 | 0.0374 | -1.259 | — |
| — | — | 2.38 | 0.0518 | -1.244 | — |
| — | — | 0.00 | 0.0800 | -1.216 | — |
| — | — | 1.96 | 0.0809 | -1.215 | — |
| — | — | 0.78 | 0.0864 | -1.210 | — |
| — | — | 0.78 | 0.0865 | -1.210 | — |
| — | — | 1.62 | 0.0884 | -1.208 | — |
Applications
Where KNaO is used.
Frequently Asked Questions
Common questions about KNaO, answered from cross-validated data.
What is KNaO?
KNaO is a semiconducting ternary oxide compound that is theoretically stable enough to be a target for laboratory synthesis.
What is KNaO used for?
What is the band gap of KNaO?
Is KNaO a metal, semiconductor, or insulator?
Is KNaO thermodynamically stable?
What is the crystal structure of KNaO?
How many polymorphs of KNaO are known?
What elements does KNaO contain?
Where does the data for KNaO come from?
How It Compares
As a ternary alkali oxide, KNaO occupies a specialized niche in materials science. While many binary alkali oxides are well-characterized, this compound serves as a critical example of the complex structural landscapes accessible within mixed-cation oxide systems.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
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