Te3As2
Te3As2 is a stable, semiconducting binary compound formed from arsenic and tellurium that is recognized for its diverse structural configurations.
About Te3As2
Te3As2 is a thermodynamically stable binary compound composed of arsenic and tellurium. As a semiconducting material, it sits on the convex hull, indicating a high degree of structural integrity and stability under standard conditions. Its electronic properties make it a subject of interest for researchers investigating mid-gap materials.
With numerous reported structures across multiple databases, this compound exhibits significant structural versatility. This complexity suggests a rich landscape for phase behavior, which is essential for understanding its potential integration into advanced electronic and optoelectronic device architectures.
Key Properties
Cross-validated computational properties for Te3As2, aggregated across 4 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 Te3As2, 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. |
|---|---|---|---|---|---|
| C2/m (No. 12) | monoclinic | 0.43 | 0.0000 | -21.135 | 5.77 |
| R-3m (No. 166) | trigonal | 0.39 | 0.0094 | -21.125 | 6.04 |
| P21/m (No. 11) | monoclinic | 0.70 | 0.0126 | -21.122 | 5.80 |
| R-3m (No. 166) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 1.55 |
| R32 (No. 155) | Trigonal | — | — | — | 5.59 |
| R32 (No. 155) | Trigonal | — | — | — | 8.76 |
| C2/m (No. 12) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| Pm (No. 6) | Monoclinic | — | — | — | 5.23 |
| C2/m (No. 12) | Monoclinic | — | — | — | 5.83 |
| C2 (No. 5) | Monoclinic | — | — | — | 3.72 |
Applications
Where Te3As2 is used.
Frequently Asked Questions
Common questions about Te3As2, answered from cross-validated data.
What is Te3As2?
Te3As2 is a stable, semiconducting binary compound formed from arsenic and tellurium that is recognized for its diverse structural configurations.
What is Te3As2 used for?
What is the band gap of Te3As2?
Is Te3As2 a metal, semiconductor, or insulator?
Is Te3As2 thermodynamically stable?
What is the crystal structure of Te3As2?
What is the density of Te3As2?
How many polymorphs of Te3As2 are known?
What elements does Te3As2 contain?
Where does the data for Te3As2 come from?
How It Compares
As a standalone representative of the arsenic-tellurium binary system, Te3As2 serves as a critical reference point for understanding phase stability and semiconducting behavior in pnictogen-chalcogenide materials.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- mpaloe — Data from mpaloe.
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