Ag2Al2
Ag2Al2 is a metallic silver-aluminum intermetallic compound that is considered a viable candidate for experimental synthesis.
About Ag2Al2
Ag2Al2 is a metallic intermetallic compound composed of silver and aluminum. Its electronic character is defined by its metallic nature, lacking a band gap, which suggests high conductivity and typical metallic bonding characteristics.
As a near-hull material, this compound is considered thermodynamically stable and likely synthesizable under appropriate experimental conditions. With numerous reported structures across multiple databases, it remains a subject of interest for researchers investigating binary alloy systems.
Key Properties
Cross-validated computational properties for Ag2Al2, 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.
Reported Structures
Lowest-energy structures reported for Ag2Al2, 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. |
|---|---|---|---|---|---|
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.0183 | -14.074 | 6.82 |
| P63/mmc (No. 194) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| I41/amd (No. 141) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Cmme (No. 67) | — | — | — | — | — |
| Fd-3m (No. 227) | — | — | — | — | — |
| Pmmn (No. 59) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
Applications
Where Ag2Al2 is used.
Frequently Asked Questions
Common questions about Ag2Al2, answered from cross-validated data.
What is Ag2Al2?
Ag2Al2 is a metallic silver-aluminum intermetallic compound that is considered a viable candidate for experimental synthesis.
What is Ag2Al2 used for?
What is the band gap of Ag2Al2?
Is Ag2Al2 a metal, semiconductor, or insulator?
Is Ag2Al2 thermodynamically stable?
What is the crystal structure of Ag2Al2?
What is the density of Ag2Al2?
How many polymorphs of Ag2Al2 are known?
What elements does Ag2Al2 contain?
Where does the data for Ag2Al2 come from?
How It Compares
As a binary intermetallic, Ag2Al2 serves as a representative example of how silver and aluminum can organize into complex structural arrangements. Without specific siblings for direct contrast, it stands as a notable case study for understanding the phase stability and structural diversity inherent in silver-rich metallic systems.
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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