Al2Os1Ru1
Al2Os1Ru1 is a semimetallic intermetallic alloy composed of aluminum, osmium, and ruthenium that is currently studied for its structural properties.
About Al2Os1Ru1
Al2Os1Ru1 is a complex intermetallic compound categorized within the platinum-group alloy catalysts. Characterized by a near-zero-gap electronic structure, it exhibits semimetallic behavior that distinguishes its charge transport properties from typical insulating or purely metallic alloys.
While it is a subject of interest in structural databases, the compound is identified as being thermodynamically above the hull, suggesting it is a metastable phase. Its existence within a class of high-performance catalytic materials makes it a candidate for studies focused on phase stability and catalytic surface reactivity.
Key Properties
Cross-validated computational properties for Al2Os1Ru1, 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 Al2Os1Ru1, 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 | 0.00 | 2.1314 | -21.453 | 3.84 |
| Immm (No. 71) | orthorhombic | 0.02 | 3.6287 | -19.955 | 0.63 |
| Pmmm (No. 47) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| Cmm2 (No. 35) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| R3m (No. 160) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
Applications
Where Al2Os1Ru1 is used.
Frequently Asked Questions
Common questions about Al2Os1Ru1, answered from cross-validated data.
What is Al2Os1Ru1?
Al2Os1Ru1 is a semimetallic intermetallic alloy composed of aluminum, osmium, and ruthenium that is currently studied for its structural properties.
What is Al2Os1Ru1 used for?
What is the band gap of Al2Os1Ru1?
Is Al2Os1Ru1 a metal, semiconductor, or insulator?
Is Al2Os1Ru1 thermodynamically stable?
What is the crystal structure of Al2Os1Ru1?
What is the density of Al2Os1Ru1?
How many polymorphs of Al2Os1Ru1 are known?
What elements does Al2Os1Ru1 contain?
Where does the data for Al2Os1Ru1 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse family of platinum-group alloys, Al2Os1Ru1 occupies a niche position compared to more robust, stable members like As2Pt or Ga2Ru. Unlike these established phases, its metastable nature places it in a different category of experimental accessibility, requiring specific synthesis conditions to stabilize its structure compared to the more readily formed intermetallics in this class.
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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