Bi2WO6
bismuth tungstate · Aurivillius phase bismuth tungstate
Bi2WO6 is a stable, semiconducting bismuth tungstate oxide widely utilized for its photocatalytic and sensing capabilities.
About bismuth tungstate
Bi2WO6 is a thermodynamically stable inorganic compound that exists as a prominent member of the Aurivillius family of layered oxides. Its semiconducting electronic character makes it a highly attractive candidate for light-harvesting applications and chemical sensing. The material is characterized by a robust structural framework that supports efficient charge carrier dynamics, which is essential for its performance in various catalytic processes. Its stability on the convex hull ensures that it remains a reliable subject for both fundamental research and practical material design.
Key Properties
Cross-validated computational properties for bismuth tungstate, aggregated across 4 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 Bi2WO6, 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. |
|---|---|---|---|---|---|
| Pca21 (No. 29) | orthorhombic | 1.91 | 0.0000 | -7.559 | 9.34 |
| Aea2 (No. 41) | orthorhombic | 1.91 | 0.0004 | -7.559 | 9.29 |
| C2/m (No. 12) | monoclinic | 2.40 | 0.0173 | -7.542 | 9.31 |
| Pca21 (No. 29) | orthorhombic | 0.56 | 0.7128 | -6.847 | 7.66 |
| No. 0 | unknown | — | — | — | 2.38 |
| Aea2 (No. 41) | Orthorhombic | — | — | — | 8.88 |
| Aea2 (No. 41) | Orthorhombic | — | — | — | 9.79 |
| Aea2 (No. 41) | Orthorhombic | — | — | — | 9.17 |
| No. 0 | unknown | — | — | — | 2.37 |
| P-1 (No. 2) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 2.38 |
Synthesis Routes
Literature-extracted synthesis procedures targeting Bi2WO6.
Applications
Where bismuth tungstate is used.
Frequently Asked Questions
Common questions about bismuth tungstate, answered from cross-validated data.
What is Bi2WO6?
Bi2WO6 is a stable, semiconducting bismuth tungstate oxide widely utilized for its photocatalytic and sensing capabilities.
What is Bi2WO6 used for?
What is the band gap of Bi2WO6?
Is Bi2WO6 a metal, semiconductor, or insulator?
Is Bi2WO6 thermodynamically stable?
What is the crystal structure of Bi2WO6?
What is the density of Bi2WO6?
How many polymorphs of Bi2WO6 are known?
How is Bi2WO6 synthesized?
What elements does Bi2WO6 contain?
Where does the data for Bi2WO6 come from?
How It Compares
As a foundational member of the layered bismuth-based oxide class, Bi2WO6 serves as a primary benchmark for studying photocatalytic activity and structural stability in complex ternary oxides. It is widely recognized for its well-defined crystal structure, which provides a versatile platform for engineering surface properties compared to more complex or less stable members of the broader bismuth-tungsten-oxygen system.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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