Al2CoO4
Cobalt aluminate · Cobalt blue, Thenard's blue
Cobalt aluminate is a synthetic inorganic pigment known for its deep, vibrant blue color. It is highly valued for its exceptional chemical stability and resistance to high temperatures, making it ideal for coloring ceramics and glass.
Key Properties
Cross-validated computational properties for Cobalt aluminate, 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.
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 Al2CoO4, 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. |
|---|---|---|---|---|---|
| P3m1 (No. 156) | trigonal | 0.00 | 0.0000 | -7.802 | 4.29 |
| Fd-3m (No. 227) | cubic | 3.00 | 0.0217 | -7.780 | 4.45 |
| P3m1 (No. 156) | trigonal | 2.27 | 0.0367 | -7.765 | 4.29 |
| Cm (No. 8) | monoclinic | 2.47 | 0.0380 | -7.764 | 4.31 |
| R3m (No. 160) | trigonal | 0.03 | 0.0514 | -7.750 | 4.29 |
| R3m (No. 160) | trigonal | 0.01 | 0.0779 | -7.724 | 4.29 |
| R3m (No. 160) | trigonal | 0.00 | 0.0867 | -7.715 | 4.29 |
| Fd-3m (No. 227) | Cubic | — | — | — | 4.29 |
| Fd-3m (No. 227) | Cubic | — | — | — | 4.58 |
| Fd-3m (No. 227) | Cubic | — | — | — | 4.45 |
| Fd-3m (No. 227) | Cubic | — | — | — | 4.44 |
| Fd-3m (No. 227) | Cubic | — | — | — | 4.45 |
Applications
Where Cobalt aluminate is used.
Frequently Asked Questions
Common questions about Cobalt aluminate, answered from cross-validated data.
What is Al2CoO4?
Cobalt aluminate is a synthetic inorganic pigment known for its deep, vibrant blue color. It is highly valued for its exceptional chemical stability and resistance to high temperatures, making it ideal for coloring ceramics and glass.
What is Al2CoO4 used for?
What is the band gap of Al2CoO4?
Is Al2CoO4 a metal, semiconductor, or insulator?
Is Al2CoO4 thermodynamically stable?
What is the crystal structure of Al2CoO4?
What is the density of Al2CoO4?
How many polymorphs of Al2CoO4 are known?
What elements does Al2CoO4 contain?
Where does the data for Al2CoO4 come from?
Related Compounds
Other Oxide Oxygen-Evolution Catalysts in the database.
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).
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