K2O
Potassium oxide · Dipotassium oxide
Potassium oxide is a reactive inorganic compound that serves as a fundamental building block in the production of various industrial chemicals. It is primarily utilized as a precursor in the manufacturing of fertilizers and specialized glass products.
Key Properties
Cross-validated computational properties for Potassium oxide, 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 K2O, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 1.71 | 0.0000 | -3.637 | 2.41 |
| Pbca (No. 61) | orthorhombic | 1.73 | 0.0204 | -3.617 | 2.34 |
| Pnnm (No. 58) | orthorhombic | 0.65 | 0.0296 | -3.608 | 2.04 |
| I41/amd (No. 141) | tetragonal | 0.11 | 0.0395 | -3.598 | 1.78 |
| C2/c (No. 15) | monoclinic | 0.38 | 0.0396 | -3.598 | 1.71 |
| C2/m (No. 12) | monoclinic | 0.88 | 0.0412 | -3.596 | 2.15 |
| P42/nmc (No. 137) | tetragonal | 1.17 | 0.0511 | -3.586 | 2.14 |
| P3 (No. 143) | trigonal | 1.85 | 0.0594 | -3.578 | 2.67 |
| P63mc (No. 186) | hexagonal | 2.27 | 0.0663 | -7.116 | 2.38 |
| P42/mcm (No. 132) | tetragonal | 1.39 | 0.0715 | -7.111 | 2.27 |
| P21 (No. 4) | monoclinic | 1.74 | 0.0882 | -3.549 | 2.37 |
| P4/mmm (No. 123) | tetragonal | 0.00 | 0.2000 | -3.437 | 1.87 |
Synthesis Routes
Literature-extracted synthesis procedures targeting K2O.
Applications
Where Potassium oxide is used.
Frequently Asked Questions
Common questions about Potassium oxide, answered from cross-validated data.
What is K2O?
Potassium oxide is a reactive inorganic compound that serves as a fundamental building block in the production of various industrial chemicals. It is primarily utilized as a precursor in the manufacturing of fertilizers and specialized glass products.
What is K2O used for?
What is the band gap of K2O?
Is K2O a metal, semiconductor, or insulator?
Is K2O thermodynamically stable?
What is the crystal structure of K2O?
What is the density of K2O?
How many polymorphs of K2O are known?
How is K2O synthesized?
What elements does K2O contain?
Where does the data for K2O come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
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