Al2O4
Al2O4 has a DFT band gap of 0.14–1.10 eV across 24 reported structures in 4 space groups. Cross-validated across 3 computational databases.
At a glance
Key Properties
Cross-validated computational properties for Al2O4, aggregated across 3 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.
0.14–1.10 eV
Range across DFT structures
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.
0.184 eV/atom
Best (lowest) across sources
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.
Above hull
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
24
3 databases, 4 space groups
Synthesis
Synthesis Routes
Literature-extracted synthesis procedures targeting Al2O4.
Sol Gel
Procedure available · ceder_sol_gel
Sol Gel
Procedure available · ceder_sol_gel
Sol Gel
Procedure available · ceder_sol_gel
Sol Gel
Procedure available · ceder_sol_gel
Sol Gel
Procedure available · ceder_sol_gel
Sol Gel
Procedure available · ceder_sol_gel
Reference
Frequently Asked Questions
Common questions about Al2O4, answered from cross-validated data.
What is the band gap of Al2O4?
Al2O4 has a DFT-computed band gap of 0.14–1.10 eV across 24 reported structures.
More questions
Is Al2O4 a metal, semiconductor, or insulator?
With a band gap up to 1.10 eV it is a semiconductor.
Is Al2O4 thermodynamically stable?
Al2O4 has a lowest energy above hull of 0.184 eV/atom (above hull).
How many polymorphs of Al2O4 are known?
24 structures of Al2O4 are reported across 3 databases, spanning 4 distinct space groups.
How is Al2O4 synthesized?
Literature-reported routes for Al2O4 include sol gel (10 procedures documented).
What elements does Al2O4 contain?
Al2O4 contains Al and O (2 elements).
Where does the data for Al2O4 come from?
Al2O4 data is cross-referenced from latticegraph.
Explore
Related Compounds
Other Spinel Oxide Catalysts in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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