EuPd
EuPd is a stable metallic alloy consisting of europium and palladium that is frequently studied for its structural properties.
About EuPd
EuPd is a metallic intermetallic compound composed of europium and palladium. As a thermodynamically stable phase located on the convex hull, it represents a robust crystalline arrangement within the broader family of platinum-group alloy catalysts.
This material is characterized by its significant structural versatility, evidenced by its presence across multiple independent crystallographic databases. Its metallic nature and stable composition make it a subject of interest for researchers investigating the fundamental electronic properties of rare-earth transition metal alloys.
Key Properties
Cross-validated computational properties for EuPd, 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 EuPd. 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 EuPd, 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. |
|---|---|---|---|---|---|
| — | — | 0.00 | 0.0000 | -0.865 | — |
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.0000 | -0.929 | — |
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.0000 | -31.450 | 8.57 |
| — | — | 0.00 | 0.0167 | -0.848 | — |
| — | — | 0.46 | 0.1652 | -0.700 | — |
| — | — | 0.00 | 0.1786 | -0.686 | — |
| — | — | 0.00 | 0.1918 | -0.673 | — |
| — | — | 0.00 | 0.2348 | -0.630 | — |
| — | — | 0.22 | 0.5871 | -0.278 | — |
| Cmcm (No. 63) | orthorhombic | — | — | — | 8.73 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 8.42 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 8.49 |
Applications
Where EuPd is used.
Frequently Asked Questions
Common questions about EuPd, answered from cross-validated data.
What is EuPd?
EuPd is a stable metallic alloy consisting of europium and palladium that is frequently studied for its structural properties.
What is EuPd used for?
What is the band gap of EuPd?
Is EuPd a metal, semiconductor, or insulator?
Is EuPd thermodynamically stable?
What is the crystal structure of EuPd?
How many polymorphs of EuPd are known?
What elements does EuPd contain?
Where does the data for EuPd come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse landscape of platinum-group alloys, EuPd distinguishes itself through its specific stoichiometry and structural stability compared to siblings like BaPd or LaRh. While many members of this class are explored for their catalytic potential, EuPd serves as a critical reference point for understanding how lanthanide-palladium interactions influence the overall stability and electronic behavior of the alloy system.
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
- alexandria — Data from Alexandria. Cite: Schmidt et al., npj Comput. Mater. 10, 200 (2024). (CC-BY-4.0)
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