Ag1Mg1Pd2
Ag1Mg1Pd2 is a semimetallic, metastable intermetallic alloy containing silver, magnesium, and palladium.
About Ag1Mg1Pd2
Ag1Mg1Pd2 is a complex intermetallic compound belonging to the class of platinum-group alloy catalysts. Characterized by a near-zero-gap electronic structure, it exhibits semimetallic behavior that is of significant interest for fundamental studies in condensed matter physics and surface science.
Due to its position above the thermodynamic hull, this material is considered metastable, reflecting the intricate synthesis challenges often found in multi-element noble metal alloys. Its structural diversity, evidenced by numerous reported configurations, makes it a subject of ongoing investigation for researchers mapping the stability landscape of palladium-based systems.
Key Properties
Cross-validated computational properties for Ag1Mg1Pd2, 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 Ag1Mg1Pd2, 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 | 0.08 | 2.1153 | -2.041 | 0.65 |
| P4/mmm (No. 123) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| Pmm2 (No. 25) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
Applications
Where Ag1Mg1Pd2 is used.
Frequently Asked Questions
Common questions about Ag1Mg1Pd2, answered from cross-validated data.
What is Ag1Mg1Pd2?
Ag1Mg1Pd2 is a semimetallic, metastable intermetallic alloy containing silver, magnesium, and palladium.
What is Ag1Mg1Pd2 used for?
What is the band gap of Ag1Mg1Pd2?
Is Ag1Mg1Pd2 a metal, semiconductor, or insulator?
Is Ag1Mg1Pd2 thermodynamically stable?
What is the crystal structure of Ag1Mg1Pd2?
What is the density of Ag1Mg1Pd2?
How many polymorphs of Ag1Mg1Pd2 are known?
What elements does Ag1Mg1Pd2 contain?
Where does the data for Ag1Mg1Pd2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Unlike more thermodynamically robust members of the platinum-group alloy class such as GeRu or IrSe2, Ag1Mg1Pd2 occupies a higher energy state, suggesting distinct kinetic pathways are required for its formation compared to its more stable counterparts.
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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