EuPd2
EuPd2 is a thermodynamically stable metallic alloy formed from europium and palladium that serves as a subject for structural and catalytic materials research.
About EuPd2
EuPd2 is a metallic intermetallic compound composed of europium and palladium. As a member of the platinum-group alloy class, it is recognized for its thermodynamic stability, sitting securely on the convex hull of its constituent elements. Its electronic structure is characterized by metallic behavior, lacking a band gap, which is typical for this category of conductive intermetallics.
This material is of significant interest in materials science due to its structural diversity, with numerous reported configurations across major databases. Its stability and composition make it a candidate for fundamental studies in alloy physics and catalytic surface science, where the interaction between rare-earth elements and noble metals is critical for performance.
Key Properties
Cross-validated computational properties for EuPd2, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of EuPd2. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for EuPd2, 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. |
|---|---|---|---|---|---|
| Fd-3m (No. 227) | cubic | 0.00 | 0.0000 | -28.898 | 10.33 |
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.3126 | -28.585 | 8.35 |
| Fd-3m (No. 227) | Cubic | — | — | — | 10.03 |
| Fd-3m (No. 227) | Cubic | — | — | — | 10.58 |
| Fd-3m (No. 227) | Cubic | — | — | — | 10.36 |
| Fd-3m (No. 227) | — | — | — | — | — |
| — | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 8.88 |
| Fd-3m (No. 227) | — | — | — | — | — |
Applications
Where EuPd2 is used.
Frequently Asked Questions
Common questions about EuPd2, answered from cross-validated data.
What is EuPd2?
EuPd2 is a thermodynamically stable metallic alloy formed from europium and palladium that serves as a subject for structural and catalytic materials research.
What is EuPd2 used for?
What is the band gap of EuPd2?
Is EuPd2 a metal, semiconductor, or insulator?
Is EuPd2 thermodynamically stable?
What is the crystal structure of EuPd2?
What is the density of EuPd2?
How many polymorphs of EuPd2 are known?
What elements does EuPd2 contain?
Where does the data for EuPd2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse family of platinum-group alloys, EuPd2 stands out for its specific rare-earth integration compared to siblings like LaRh. While many members of this class, such as GeRu or As2Ir, are engineered for specific catalytic or electronic functions, EuPd2 is notable for its well-defined thermodynamic stability and its structural richness, providing a robust platform for comparing how different lanthanide-noble metal combinations influence lattice geometry.
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).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- alexandria — Data from alexandria.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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