Al2Se3
Aluminum selenide · Dialuminum triselenide
Aluminum selenide is a chemical compound that reacts readily with water to produce hydrogen selenide gas. It is primarily utilized as a specialized precursor in the synthesis of other selenium-containing materials and semiconductor components.
Key Properties
Cross-validated computational properties for Aluminum selenide, 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 Al2Se3, 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. |
|---|---|---|---|---|---|
| Cc (No. 9) | monoclinic | 1.80 | 0.0000 | -12.289 | 3.83 |
| I41/amd (No. 141) | tetragonal | 1.12 | 0.0280 | -12.261 | 4.28 |
| R3 (No. 146) | trigonal | 0.96 | 0.0802 | -12.208 | 3.51 |
| P1 (No. 1) | triclinic | 0.59 | 1.8126 | -10.476 | 0.34 |
| C2/m (No. 12) | Monoclinic | — | — | — | 3.19 |
| P3m1 (No. 156) | Trigonal | — | — | — | 5.55 |
| Amm2 (No. 38) | Orthorhombic | — | — | — | 2.61 |
| Pm (No. 6) | Monoclinic | — | — | — | 5.06 |
| C2/m (No. 12) | Monoclinic | — | — | — | 4.60 |
| C2/m (No. 12) | Monoclinic | — | — | — | 6.73 |
| R3 (No. 146) | Trigonal | — | — | — | 3.65 |
| R3 (No. 146) | Trigonal | — | — | — | 3.51 |
Applications
Where Aluminum selenide is used.
Frequently Asked Questions
Common questions about Aluminum selenide, answered from cross-validated data.
What is Al2Se3?
Aluminum selenide is a chemical compound that reacts readily with water to produce hydrogen selenide gas. It is primarily utilized as a specialized precursor in the synthesis of other selenium-containing materials and semiconductor components.
What is Al2Se3 used for?
What is the band gap of Al2Se3?
Is Al2Se3 a metal, semiconductor, or insulator?
Is Al2Se3 thermodynamically stable?
What is the crystal structure of Al2Se3?
What is the density of Al2Se3?
How many polymorphs of Al2Se3 are known?
What elements does Al2Se3 contain?
Where does the data for Al2Se3 come from?
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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