Au1Pb1Pd2
Au1Pb1Pd2 is a semimetallic ternary alloy composed of gold, lead, and palladium that is primarily studied for its potential in specialized catalytic applications.
About Au1Pb1Pd2
Au1Pb1Pd2 is a complex ternary alloy within the platinum-group metal family. Exhibiting near-zero-gap semimetallic behavior, this material represents a unique intersection of noble metal chemistry and heavy-element physics, offering intriguing electronic properties for specialized catalytic research.
While this compound is currently classified as thermodynamically unstable relative to its constituent elements, its structural diversity is evidenced by numerous reported configurations. It serves as a subject of interest for researchers investigating metastable phase formation and the tuning of catalytic activity through precise atomic arrangement.
Key Properties
Cross-validated computational properties for Au1Pb1Pd2, aggregated across 2 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 Au1Pb1Pd2, 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. |
|---|---|---|---|---|---|
| Immm (No. 71) | orthorhombic | 0.03 | 1.7132 | -36.707 | 1.02 |
| Pmm2 (No. 25) | — | — | — | — | — |
| Immm (No. 71) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| R3m (No. 160) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
Applications
Where Au1Pb1Pd2 is used.
Frequently Asked Questions
Common questions about Au1Pb1Pd2, answered from cross-validated data.
What is Au1Pb1Pd2?
Au1Pb1Pd2 is a semimetallic ternary alloy composed of gold, lead, and palladium that is primarily studied for its potential in specialized catalytic applications.
What is Au1Pb1Pd2 used for?
What is the band gap of Au1Pb1Pd2?
Is Au1Pb1Pd2 a metal, semiconductor, or insulator?
Is Au1Pb1Pd2 thermodynamically stable?
What is the crystal structure of Au1Pb1Pd2?
What is the density of Au1Pb1Pd2?
How many polymorphs of Au1Pb1Pd2 are known?
What elements does Au1Pb1Pd2 contain?
Where does the data for Au1Pb1Pd2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Unlike more stable or widely utilized members of the platinum-group alloy class such as GeRu or BaPd, Au1Pb1Pd2 exists in a metastable state above the hull. This places it in a distinct category of experimental materials where synthesis control is critical to accessing its specific electronic properties compared to the more robust, naturally occurring phases found elsewhere in the group.
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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