MoW
MoW is a thermodynamically stable metallic alloy formed from molybdenum and tungsten.
About MoW
MoW is a binary metallic alloy composed of molybdenum and tungsten. As a thermodynamically stable phase that sits directly on the convex hull, it represents a robust configuration of these two refractory transition metals. Its metallic nature is consistent with the electronic behavior expected of such transition metal combinations.
This compound is characterized by its high structural diversity, with a significant number of reported structures across major materials databases. This data richness highlights its importance as a fundamental system for studying solid-solution behavior and intermetallic stability in high-temperature metallurgy.
Key Properties
Cross-validated computational properties for MoW, aggregated across 5 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 MoW. 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 MoW, 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. |
|---|---|---|---|---|---|
| Cmmm (No. 65) | orthorhombic | 0.00 | 0.0000 | -38.720 | 14.67 |
| — | — | 0.00 | 0.0002 | -0.010 | — |
| — | — | 0.00 | 0.3970 | 0.387 | — |
| — | — | 0.00 | 0.4786 | 0.468 | — |
| Pm-3m (No. 221) | cubic | 0.00 | 0.5350 | 0.257 | — |
| — | — | 0.00 | 0.6161 | 0.606 | — |
| — | — | 0.00 | 1.3130 | 1.303 | — |
| — | — | 0.00 | 2.4600 | 2.450 | — |
| P1 (No. 1) | triclinic | — | — | — | 17.16 |
| P1 (No. 1) | triclinic | — | — | — | 12.06 |
| P1 (No. 1) | triclinic | — | — | — | 14.56 |
| P1 (No. 1) | triclinic | — | — | — | 15.30 |
Applications
Where MoW is used.
Frequently Asked Questions
Common questions about MoW, answered from cross-validated data.
What is MoW?
MoW is a thermodynamically stable metallic alloy formed from molybdenum and tungsten.
What is MoW used for?
What is the band gap of MoW?
Is MoW a metal, semiconductor, or insulator?
Is MoW thermodynamically stable?
What is the crystal structure of MoW?
What is the density of MoW?
How many polymorphs of MoW are known?
What elements does MoW contain?
Where does the data for MoW come from?
How It Compares
As a stable binary alloy of two closely related transition metals, MoW serves as a primary model for understanding the alloying behavior of refractory elements. It occupies a central role in the study of molybdenum-tungsten systems, providing a baseline for the structural and electronic properties of these high-performance metallic materials.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- 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)
- 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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