MoPb
MoPb is a metallic molybdenum-lead compound that is characterized by its metastable nature and diverse structural reports.
About MoPb
MoPb is a metallic intermetallic compound composed of molybdenum and lead. As a metallic phase, it exhibits characteristic electron conductivity associated with its elemental constituents, though it is currently classified as a metastable phase that resides above the thermodynamic ground state hull.
Despite its status as an unstable phase, the compound has been the subject of significant structural investigation. It is represented by a notable collection of reported structures across multiple materials databases, highlighting its role as a point of interest for researchers studying molybdenum-lead interactions.
Key Properties
Cross-validated computational properties for MoPb, 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 MoPb, 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. |
|---|---|---|---|---|---|
| I41/amd (No. 141) | tetragonal | 0.00 | 0.9691 | -40.209 | 12.31 |
| I41/amd (No. 141) | — | — | — | — | — |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 9.06 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 15.87 |
| P2/m (No. 10) | Monoclinic | — | — | — | 12.77 |
| P2/m (No. 10) | Monoclinic | — | — | — | 12.28 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 12.62 |
| P2/m (No. 10) | Monoclinic | — | — | — | 9.85 |
| Pm-3m (No. 221) | — | — | — | — | — |
| — | — | — | — | — | — |
| — | — | — | — | — | 12.38 |
Frequently Asked Questions
Common questions about MoPb, answered from cross-validated data.
What is MoPb?
MoPb is a metallic molybdenum-lead compound that is characterized by its metastable nature and diverse structural reports.
What is the band gap of MoPb?
Is MoPb a metal, semiconductor, or insulator?
Is MoPb thermodynamically stable?
What is the crystal structure of MoPb?
What is the density of MoPb?
How many polymorphs of MoPb are known?
What elements does MoPb contain?
Where does the data for MoPb come from?
How It Compares
As a unique binary combination of molybdenum and lead, MoPb occupies a distinct niche in materials science. Without direct structural siblings in this specific class, it serves as a primary reference point for understanding the complex phase behavior and structural diversity possible within molybdenum-heavy metal systems.
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).
- mpaloe — Data from mpaloe.
- alexandria — Data from alexandria.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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