PbPtY2
PbPtY2 is a semiconducting intermetallic compound containing lead, platinum, and yttrium that is studied for its unique structural properties within the platinum-group alloy class.
About PbPtY2
PbPtY2 is a specialized intermetallic compound categorized within the platinum-group alloy catalysts. As a semiconducting material, it represents a complex arrangement of lead, platinum, and yttrium that deviates from typical metallic behavior found in this class.
Due to its position above the thermodynamic hull, this compound is considered metastable, making it a subject of interest for researchers studying phase stability and synthetic pathways. Its limited structural data across databases highlights its status as an exploratory material in the broader landscape of catalytic alloys.
Key Properties
Cross-validated computational properties for PbPtY2, aggregated across 3 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 PbPtY2, 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 | 0.11 | 2.5643 | -35.539 | 0.73 |
| — | — | — | — | — | — |
| — | — | — | — | — | 9.62 |
Applications
Where PbPtY2 is used.
Frequently Asked Questions
Common questions about PbPtY2, answered from cross-validated data.
What is PbPtY2?
PbPtY2 is a semiconducting intermetallic compound containing lead, platinum, and yttrium that is studied for its unique structural properties within the platinum-group alloy class.
What is PbPtY2 used for?
What is the band gap of PbPtY2?
Is PbPtY2 a metal, semiconductor, or insulator?
Is PbPtY2 thermodynamically stable?
What is the crystal structure of PbPtY2?
What is the density of PbPtY2?
How many polymorphs of PbPtY2 are known?
What elements does PbPtY2 contain?
Where does the data for PbPtY2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Unlike more stable and widely characterized members of the platinum-group alloy class such as As2Pt or GeRu, PbPtY2 exhibits a higher degree of thermodynamic instability. While many of its siblings are optimized for robust catalytic performance, this compound serves as a unique case study in how the inclusion of heavy elements like lead and rare-earth components like yttrium alters the electronic and structural landscape compared to simpler binary systems like BaPd.
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).
- alexandria — Data from alexandria.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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