O8W4
O8W4 has a DFT band gap of 0.57–2.48 eV across 29 reported structures in 12 space groups; its lowest-energy polymorph is monoclinic (P21/c (No. 14)). Cross-validated across 4 computational databases.
At a glance
Key Properties
Cross-validated computational properties for O8W4, 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.
0.57–2.48 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
29
4 databases, 12 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for O8W4, 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 | 0.00 | 0.0000 | -23.172 | 10.68 |
| P42/mnm (No. 136) | tetragonal | 0.00 | 0.0000 | -9.655 | 9.60 |
| I4/m (No. 87) | tetragonal | 2.33 | 0.1059 | -9.549 | 7.66 |
| Pnma (No. 62) | orthorhombic | 2.48 | 0.1086 | -9.546 | 8.41 |
| P1 (No. 1) | triclinic | 1.34 | 0.1316 | -9.523 | 9.19 |
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.2349 | -9.420 | 7.26 |
| Pnma (No. 62) | orthorhombic | 0.00 | 0.2580 | -9.397 | 9.75 |
| R-3m (No. 166) | trigonal | 1.99 | 0.2692 | -9.385 | 8.39 |
| P1 (No. 1) | triclinic | 1.68 | 0.3131 | -9.342 | 7.55 |
| Cm (No. 8) | monoclinic | 1.64 | 0.3407 | -9.314 | 7.81 |
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.3931 | -9.262 | 8.27 |
| P1 (No. 1) | triclinic | 0.57 | 0.4810 | -9.174 | 7.35 |
Reference
Frequently Asked Questions
Common questions about O8W4, answered from cross-validated data.
What is the band gap of O8W4?
O8W4 has a DFT-computed band gap of 0.57–2.48 eV across 29 reported structures.
More questions
Is O8W4 a metal, semiconductor, or insulator?
With a band gap up to 2.48 eV it is a semiconductor.
Is O8W4 thermodynamically stable?
Yes — O8W4 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of O8W4?
The lowest-energy reported polymorph of O8W4 is monoclinic symmetry, space group P21/c (No. 14).
What is the density of O8W4?
The computed density of the ground-state structure of O8W4 is 10.68 g/cm³.
How many polymorphs of O8W4 are known?
29 structures of O8W4 are reported across 4 databases, spanning 12 distinct space groups.
What elements does O8W4 contain?
O8W4 contains O and W (2 elements).
Where does the data for O8W4 come from?
O8W4 data is cross-referenced from materials_project, aflow, cod, omat24.
Explore
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
Analyze O8W4 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →