CoW
CoW is a metallic binary intermetallic compound formed from cobalt and tungsten.
About CoW
CoW is a metallic intermetallic compound composed of cobalt and tungsten. As a metallic system, it exhibits characteristic electrical conductivity associated with its electronic structure, making it a subject of interest in fundamental materials science studies. Due to its position above the thermodynamic hull, CoW is considered a metastable phase. Its existence is supported by a significant volume of structural data, reflecting its complex behavior within binary transition metal systems.
Key Properties
Cross-validated computational properties for CoW, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of CoW. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for CoW, 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. |
|---|---|---|---|---|---|
| — | — | 0.00 | 0.0481 | -0.014 | — |
| — | — | 0.00 | 0.0873 | 0.025 | — |
| — | — | 0.00 | 0.1029 | 0.041 | — |
| — | — | 0.00 | 0.1102 | 0.048 | — |
| — | — | 0.00 | 0.1339 | 0.072 | — |
| — | — | 0.00 | 0.2104 | 0.148 | — |
| — | — | 0.00 | 0.2849 | 0.223 | — |
| — | — | 0.00 | 0.3477 | 0.286 | — |
| Pm-3m (No. 221) | cubic | 0.00 | 0.3538 | -31.947 | 14.85 |
| Pm-3m (No. 221) | cubic | 0.00 | 0.3962 | 0.043 | — |
| — | — | 0.00 | 0.4020 | 0.340 | — |
| — | — | 0.00 | 0.6220 | 0.560 | — |
Applications
Where CoW is used.
Frequently Asked Questions
Common questions about CoW, answered from cross-validated data.
What is CoW?
CoW is a metallic binary intermetallic compound formed from cobalt and tungsten.
What is CoW used for?
What is the band gap of CoW?
Is CoW a metal, semiconductor, or insulator?
Is CoW thermodynamically stable?
What is the crystal structure of CoW?
What is the density of CoW?
How many polymorphs of CoW are known?
What elements does CoW contain?
Where does the data for CoW come from?
How It Compares
As a binary intermetallic, CoW represents a specific stoichiometry within the cobalt-tungsten system. It functions as a distinct phase in the study of transition metal alloys, where its stability and structural characteristics are evaluated against other possible configurations of these two elements.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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