K2W2O7
K2W2O7 is a thermodynamically stable potassium tungstate semiconductor used in materials research.
About K2W2O7
K2W2O7 is a potassium tungstate compound that exhibits semiconducting electronic behavior. As a thermodynamically stable phase located on the convex hull, it represents a robust crystalline arrangement within the potassium-tungsten-oxygen system.
This material is of significant interest for researchers investigating complex oxide frameworks. Its structural stability and electronic nature make it a candidate for studies involving ion transport and solid-state chemistry applications.
Key Properties
Cross-validated computational properties for K2W2O7, 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 K2W2O7, 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 | 2.44 | 0.0000 | -7.994 | 5.77 |
| P21/c (No. 14) | Monoclinic | — | — | — | 5.45 |
| P21/c (No. 14) | Monoclinic | — | — | — | 6.09 |
| P21/c (No. 14) | Monoclinic | — | — | — | 5.62 |
| P21/c (No. 14) | — | — | — | — | — |
Applications
Where K2W2O7 is used.
Frequently Asked Questions
Common questions about K2W2O7, answered from cross-validated data.
What is K2W2O7?
K2W2O7 is a thermodynamically stable potassium tungstate semiconductor used in materials research.
What is K2W2O7 used for?
What is the band gap of K2W2O7?
Is K2W2O7 a metal, semiconductor, or insulator?
Is K2W2O7 thermodynamically stable?
What is the crystal structure of K2W2O7?
What is the density of K2W2O7?
How many polymorphs of K2W2O7 are known?
What elements does K2W2O7 contain?
Where does the data for K2W2O7 come from?
How It Compares
As a stable member of the potassium tungstate family, K2W2O7 serves as a foundational reference point for understanding the phase space of ternary tungsten oxides. Its presence on the convex hull highlights its durability compared to metastable configurations, positioning it as a reliable subject for experimental characterization.
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).
Analyze K2W2O7 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →