CoPb3
CoPb3 is a metallic cobalt-lead intermetallic compound that exists as a metastable phase.
About CoPb3
CoPb3 is a metallic intermetallic compound composed of cobalt and lead. As a metallic system, it exhibits characteristic electronic behavior typical of transition metal-heavy metal alloys, reflecting the complex bonding interactions between the d-orbitals of cobalt and the p-orbitals of lead.
This material is recognized as being thermodynamically metastable, placing it above the convex hull in energy landscapes. Despite its instability, it has been the subject of significant structural investigation across multiple databases, highlighting interest in the diverse atomic arrangements possible within this binary chemical space.
Key Properties
Cross-validated computational properties for CoPb3, 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 CoPb3, 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. |
|---|---|---|---|---|---|
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.3623 | -45.160 | 10.15 |
| Fm-3m (No. 225) | cubic | 0.00 | 0.5749 | -44.948 | 11.19 |
| Pm-3m (No. 221) | — | — | — | — | — |
| — | — | — | — | — | 11.16 |
| Pc (No. 7) | Monoclinic | — | — | — | 9.03 |
| Pc (No. 7) | Monoclinic | — | — | — | 10.21 |
| P4/mmm (No. 123) | — | — | — | — | — |
| Pc (No. 7) | Monoclinic | — | — | — | 10.15 |
Applications
Where CoPb3 is used.
Frequently Asked Questions
Common questions about CoPb3, answered from cross-validated data.
What is CoPb3?
CoPb3 is a metallic cobalt-lead intermetallic compound that exists as a metastable phase.
What is CoPb3 used for?
What is the band gap of CoPb3?
Is CoPb3 a metal, semiconductor, or insulator?
Is CoPb3 thermodynamically stable?
What is the crystal structure of CoPb3?
What is the density of CoPb3?
How many polymorphs of CoPb3 are known?
What elements does CoPb3 contain?
Where does the data for CoPb3 come from?
How It Compares
As a binary intermetallic compound, CoPb3 represents a specific structural configuration within the cobalt-lead system. While it lacks stable thermodynamic equilibrium, its existence across numerous reported structures underscores the complexity of phase formation in heavy-metal alloys, where kinetic factors often dictate the accessibility of such metastable phases.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- mpaloe — Data from mpaloe.
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
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