Cu3W
Cu3W is a metallic copper-tungsten intermetallic compound that exists as a metastable phase.
About Cu3W
Cu3W is a metallic intermetallic compound composed of copper and tungsten. As a material lacking a band gap, it exhibits characteristic metallic electronic properties, making it a subject of interest for fundamental studies in transition metal alloy systems.
Despite its existence in multiple structural configurations across various databases, it is considered a metastable phase that sits above the thermodynamic hull. This suggests that while it can be synthesized under specific conditions, it remains a complex subject for experimental phase stabilization.
Key Properties
Cross-validated computational properties for Cu3W, 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.
Reported Structures
Lowest-energy structures reported for Cu3W, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 0.00 | 0.4405 | -20.537 | 12.01 |
| P4/mmm (No. 123) | — | — | — | — | — |
| P-3m1 (No. 164) | Trigonal | — | — | — | 6.91 |
| P-3m1 (No. 164) | Trigonal | — | — | — | 9.39 |
| P3m1 (No. 156) | Trigonal | — | — | — | 11.31 |
| P3m1 (No. 156) | Trigonal | — | — | — | 11.35 |
| P-3m1 (No. 164) | Trigonal | — | — | — | 8.55 |
| Cm (No. 8) | Monoclinic | — | — | — | 11.27 |
| — | — | — | — | — | 12.08 |
| — | — | — | — | — | 12.02 |
| Pm-3m (No. 221) | — | — | — | — | — |
Applications
Where Cu3W is used.
Frequently Asked Questions
Common questions about Cu3W, answered from cross-validated data.
What is Cu3W?
Cu3W is a metallic copper-tungsten intermetallic compound that exists as a metastable phase.
What is Cu3W used for?
What is the band gap of Cu3W?
Is Cu3W a metal, semiconductor, or insulator?
Is Cu3W thermodynamically stable?
What is the crystal structure of Cu3W?
What is the density of Cu3W?
How many polymorphs of Cu3W are known?
What elements does Cu3W contain?
Where does the data for Cu3W come from?
How It Compares
As an unclassified intermetallic system, Cu3W represents a unique binary combination of copper and tungsten that does not belong to a broader, well-defined structural family, highlighting the diverse and often challenging nature of transition metal alloying.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- mpaloe — Data from mpaloe.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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