Al2Te5
Al2Te5 is a thermodynamically stable semiconducting binary compound composed of aluminum and tellurium.
About Al2Te5
Al2Te5 is a distinct aluminum telluride compound that occupies a stable position on the thermodynamic convex hull. As a semiconducting material, it represents a specialized binary phase within the aluminum-tellurium system, characterized by a complex structural landscape with numerous reported configurations across multiple databases.
Its significance lies in its electronic behavior, which makes it a subject of interest for researchers investigating new semiconducting binaries. By maintaining thermodynamic stability, this compound offers a reliable framework for studying the interplay between aluminum and tellurium in solid-state applications.
Key Properties
Cross-validated computational properties for Al2Te5, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Al2Te5. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for Al2Te5, 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 | 1.05 | 0.0000 | -0.356 | — |
| C2/m (No. 12) | monoclinic | 1.05 | 0.0000 | -20.481 | 4.78 |
| — | — | 1.05 | 0.0000 | -0.326 | — |
| C2/m (No. 12) | monoclinic | 0.97 | — | -3.640 | 4.64 |
| P-1 (No. 2) | triclinic | — | — | — | 4.85 |
| P-1 (No. 2) | triclinic | — | — | — | 4.39 |
| P-1 (No. 2) | triclinic | — | — | — | 4.82 |
| P-1 (No. 2) | triclinic | — | — | — | 4.19 |
| P2/m (No. 10) | monoclinic | — | — | — | 5.58 |
| C2/m (No. 12) | monoclinic | — | — | — | 4.54 |
| P-1 (No. 2) | triclinic | — | — | — | 4.63 |
| C2/m (No. 12) | monoclinic | — | — | — | 4.46 |
Applications
Where Al2Te5 is used.
Frequently Asked Questions
Common questions about Al2Te5, answered from cross-validated data.
What is Al2Te5?
Al2Te5 is a thermodynamically stable semiconducting binary compound composed of aluminum and tellurium.
What is Al2Te5 used for?
What is the band gap of Al2Te5?
Is Al2Te5 a metal, semiconductor, or insulator?
Is Al2Te5 thermodynamically stable?
What is the crystal structure of Al2Te5?
How many polymorphs of Al2Te5 are known?
What elements does Al2Te5 contain?
Where does the data for Al2Te5 come from?
How It Compares
As a unique binary phase in the aluminum-tellurium system, Al2Te5 serves as a critical reference point for understanding the structural diversity of metal-chalcogenide semiconductors. Without direct structural siblings in this specific stoichiometry, it stands as a standalone example of how aluminum and tellurium can organize into stable, semiconducting architectures.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- aflow — Data from AFLOW (aflow.org). Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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