WO5
WO5 is a semiconducting tungsten oxide phase that exists as a metastable material within the refractory-metal oxide class.
About WO5
WO5 is a semiconducting oxide composed of tungsten and oxygen. As a member of the refractory-metal oxide family, it represents a complex structural arrangement that has been documented across multiple crystalline configurations in materials databases. Its electronic properties place it within the semiconductor regime, making it a subject of interest for fundamental studies in transition metal oxide behavior. Given its position relative to the thermodynamic ground state, it is considered a metastable phase that requires specific synthesis conditions to stabilize. This compound serves as a critical point of comparison for understanding the diverse stoichiometry possible within tungsten-based oxide systems.
Key Properties
Cross-validated computational properties for WO5, 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 WO5, 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 (No. 4) | monoclinic | 1.45 | 0.4344 | -7.309 | 3.58 |
| Pmma (No. 51) | orthorhombic | 0.00 | 0.7595 | -6.984 | 4.74 |
| P21/c (No. 14) | monoclinic | 0.32 | 0.7950 | -6.949 | 4.41 |
| P21 (No. 4) | monoclinic | 0.58 | 0.7958 | -6.948 | 4.48 |
| Amm2 (No. 38) | Orthorhombic | — | — | — | 8.72 |
| P-1 (No. 2) | Triclinic | — | — | — | 6.14 |
| C2/m (No. 12) | Monoclinic | — | — | — | 6.21 |
| C2/m (No. 12) | Monoclinic | — | — | — | 6.26 |
| I4/m (No. 87) | Tetragonal | — | — | — | 5.94 |
| I4/m (No. 87) | Tetragonal | — | — | — | 5.93 |
| I4/m (No. 87) | Tetragonal | — | — | — | 5.96 |
| Cm (No. 8) | Monoclinic | — | — | — | 7.98 |
Applications
Where WO5 is used.
Frequently Asked Questions
Common questions about WO5, answered from cross-validated data.
What is WO5?
WO5 is a semiconducting tungsten oxide phase that exists as a metastable material within the refractory-metal oxide class.
What is WO5 used for?
What is the band gap of WO5?
Is WO5 a metal, semiconductor, or insulator?
Is WO5 thermodynamically stable?
What is the crystal structure of WO5?
What is the density of WO5?
How many polymorphs of WO5 are known?
What elements does WO5 contain?
Where does the data for WO5 come from?
How It Compares
Within the electrochromic and refractory-metal oxides class.
Within the broader class of electrochromic and refractory-metal oxides, WO5 occupies a distinct niche compared to more common, stable counterparts like WO3. While WO3 is a well-characterized, thermodynamically robust material widely utilized for its electrochromic switching capabilities, WO5 represents a more exotic stoichiometry that challenges standard structural models. Its behavior contrasts with the more frequently studied oxides such as V2O5 and MoO3, which exhibit well-defined phase stability and predictable electronic transitions.
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.
Analyze WO5 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →