Al3Os2
Al3Os2 is a metallic intermetallic compound formed from aluminum and osmium that exhibits significant structural stability.
About Al3Os2
Al3Os2 is a metallic intermetallic compound composed of aluminum and osmium. Its electronic character is defined by its metallic nature, lacking a band gap, which influences its potential for specialized conductive applications. The material is recognized for being near the thermodynamic hull, suggesting it is a stable phase that is likely synthesizable under controlled experimental conditions.
With extensive data available across multiple structural databases, this compound represents a well-documented system for researchers studying binary aluminides. Its structural complexity and stability profile make it an interesting candidate for investigations into transition metal-aluminum phase behavior and alloy development.
Key Properties
Cross-validated computational properties for Al3Os2, 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 Al3Os2, 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. |
|---|---|---|---|---|---|
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.0074 | -25.829 | 11.21 |
| C2 (No. 5) | Monoclinic | — | — | — | 9.35 |
| P1 (No. 1) | Triclinic | — | — | — | 10.19 |
| R3 (No. 146) | Trigonal | — | — | — | 8.20 |
| Pm (No. 6) | Monoclinic | — | — | — | 6.09 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 10.98 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 11.66 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 11.22 |
| Cm (No. 8) | Monoclinic | — | — | — | 6.62 |
| Cm (No. 8) | Monoclinic | — | — | — | 5.99 |
| P1 (No. 1) | Triclinic | — | — | — | 6.21 |
| Cmm2 (No. 35) | Orthorhombic | — | — | — | 9.82 |
Applications
Where Al3Os2 is used.
Frequently Asked Questions
Common questions about Al3Os2, answered from cross-validated data.
What is Al3Os2?
Al3Os2 is a metallic intermetallic compound formed from aluminum and osmium that exhibits significant structural stability.
What is Al3Os2 used for?
What is the band gap of Al3Os2?
Is Al3Os2 a metal, semiconductor, or insulator?
Is Al3Os2 thermodynamically stable?
What is the crystal structure of Al3Os2?
What is the density of Al3Os2?
How many polymorphs of Al3Os2 are known?
What elements does Al3Os2 contain?
Where does the data for Al3Os2 come from?
How It Compares
As a binary aluminide, Al3Os2 occupies a unique space in materials science, serving as a distinct example of how transition metals interact with aluminum to form stable, metallic phases. Without direct structural analogs in this specific grouping, it stands as a reference point for understanding the bonding and phase stability of osmium-rich intermetallics.
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).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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