W2O3
W2O3 is a semiconducting tungsten oxide phase characterized by its structural diversity and its place within the refractory-metal oxide material family.
About W2O3
W2O3 is a semiconducting oxide composed of tungsten and oxygen. As a member of the refractory-metal oxide class, it represents a complex phase space that has been extensively documented across numerous structural configurations in materials databases.
While its thermodynamic position above the hull suggests it may be metastable under standard conditions, it remains a subject of interest for researchers studying the diverse stoichiometry of tungsten oxides. Its electronic character positions it within the broader family of transition metal oxides often explored for their potential in electrochromic and catalytic applications.
Key Properties
Cross-validated computational properties for W2O3, aggregated across 2 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 W2O3, 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 | 0.21 | 0.8733 | -9.112 | 10.27 |
| Cm (No. 8) | Monoclinic | — | — | — | 16.75 |
| P-1 (No. 2) | Triclinic | — | — | — | 13.00 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 13.34 |
| P-3m1 (No. 164) | Trigonal | — | — | — | 13.76 |
| C2/m (No. 12) | Monoclinic | — | — | — | 14.04 |
| C2 (No. 5) | Monoclinic | — | — | — | 12.21 |
| C2 (No. 5) | Monoclinic | — | — | — | 14.44 |
| C2/m (No. 12) | Monoclinic | — | — | — | 15.08 |
| C2/m (No. 12) | Monoclinic | — | — | — | 10.67 |
| C2/m (No. 12) | Monoclinic | — | — | — | 12.13 |
| C2 (No. 5) | Monoclinic | — | — | — | 10.14 |
Applications
Where W2O3 is used.
Frequently Asked Questions
Common questions about W2O3, answered from cross-validated data.
What is W2O3?
W2O3 is a semiconducting tungsten oxide phase characterized by its structural diversity and its place within the refractory-metal oxide material family.
What is W2O3 used for?
What is the band gap of W2O3?
Is W2O3 a metal, semiconductor, or insulator?
Is W2O3 thermodynamically stable?
What is the crystal structure of W2O3?
What is the density of W2O3?
How many polymorphs of W2O3 are known?
What elements does W2O3 contain?
Where does the data for W2O3 come from?
How It Compares
Within the electrochromic and refractory-metal oxides class.
Within the class of refractory-metal oxides, W2O3 serves as a less common stoichiometry compared to the highly stable and widely utilized WO3. While siblings like V2O5 and MoO3 are frequently leveraged for their robust electrochromic performance, W2O3 represents a more specialized, structurally diverse phase that highlights the intricate compositional variety inherent in tungsten-based systems.
Related Compounds
Other Electrochromic and Refractory-Metal Oxides in the database.
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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