BiO4W
bismuth tungstate · Bi2WO6
BiO4W is a metastable semiconducting bismuth tungstate compound used in advanced materials research.
About bismuth tungstate
BiO4W is a complex bismuth tungstate compound that exhibits semiconducting behavior. As a metastable phase, it represents a unique structural arrangement within the bismuth-tungsten-oxygen system, offering distinct electronic characteristics that differentiate it from more common stoichiometric oxides.
This material is of significant interest in materials science due to its potential for light-harvesting and catalytic processes. Its metastable nature suggests that synthesis conditions play a critical role in stabilizing its structure, making it a focal point for research into advanced functional materials.
Key Properties
Cross-validated computational properties for bismuth tungstate, 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 BiO4W, 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. |
|---|---|---|---|---|---|
| P2/c (No. 13) | monoclinic | 0.00 | 0.0930 | -8.211 | 8.76 |
| P-1 (No. 2) | triclinic | 0.19 | 0.1091 | -8.194 | 8.31 |
| I41/a (No. 88) | tetragonal | 1.34 | 0.1160 | -7.967 | 9.02 |
| — | — | — | — | — | — |
| — | — | — | — | — | 7.73 |
| — | — | — | — | — | 7.73 |
Applications
Where bismuth tungstate is used.
Frequently Asked Questions
Common questions about bismuth tungstate, answered from cross-validated data.
What is BiO4W?
BiO4W is a metastable semiconducting bismuth tungstate compound used in advanced materials research.
What is BiO4W used for?
What is the band gap of BiO4W?
Is BiO4W a metal, semiconductor, or insulator?
Is BiO4W thermodynamically stable?
What is the crystal structure of BiO4W?
What is the density of BiO4W?
How many polymorphs of BiO4W are known?
What elements does BiO4W contain?
Where does the data for BiO4W come from?
How It Compares
As a specialized bismuth tungstate, BiO4W occupies a unique niche in the landscape of complex ternary oxides. Unlike more thermodynamically stable binary oxides, this compound provides a specific electronic environment that is highly sought after for tuning photocatalytic activity and charge carrier dynamics.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- alexandria — Data from alexandria.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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