In1Os2Ta1
In1Os2Ta1 is a semimetallic ternary compound comprised of indium, osmium, and tantalum.
About In1Os2Ta1
In1Os2Ta1 is a complex ternary compound composed of indium, osmium, and tantalum. Its electronic character is defined as a near-zero-gap semimetallic material, placing it in a unique regime between traditional insulators and conductors.
Despite its structural complexity, the compound is identified as being thermodynamically unstable relative to the ground state. It remains a subject of interest for researchers investigating the diverse phase space of ternary intermetallic systems.
Key Properties
Cross-validated computational properties for In1Os2Ta1, 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 In1Os2Ta1, 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 | 0.09 | 3.8217 | -40.623 | 1.32 |
| Pm (No. 6) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Cmm2 (No. 35) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
Frequently Asked Questions
Common questions about In1Os2Ta1, answered from cross-validated data.
What is In1Os2Ta1?
In1Os2Ta1 is a semimetallic ternary compound comprised of indium, osmium, and tantalum.
What is the band gap of In1Os2Ta1?
Is In1Os2Ta1 a metal, semiconductor, or insulator?
Is In1Os2Ta1 thermodynamically stable?
What is the crystal structure of In1Os2Ta1?
What is the density of In1Os2Ta1?
How many polymorphs of In1Os2Ta1 are known?
What elements does In1Os2Ta1 contain?
Where does the data for In1Os2Ta1 come from?
How It Compares
As a unique ternary phase, In1Os2Ta1 represents a specific point in the compositional landscape of indium-osmium-tantalum systems. Because it sits above the thermodynamic hull, it serves as a critical data point for understanding the formation and stability limits of complex intermetallic structures.
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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