Ac2O3
Actinium oxide · Actinia
Actinium oxide is a highly radioactive white solid compound containing the rare earth metal actinium. Due to its intense radioactivity and scarcity, it is primarily utilized in specialized scientific research and studies involving radioactive decay.
Key Properties
Cross-validated computational properties for Actinium oxide, 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 Ac2O3, 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. |
|---|---|---|---|---|---|
| P-3m1 (No. 164) | trigonal | 3.52 | 0.0000 | -8.355 | 9.11 |
| P-3m1 (No. 164) | — | — | — | — | — |
| P-3m1 (No. 164) | — | — | — | — | — |
Applications
Where Actinium oxide is used.
Frequently Asked Questions
Common questions about Actinium oxide, answered from cross-validated data.
What is Ac2O3?
Actinium oxide is a highly radioactive white solid compound containing the rare earth metal actinium. Due to its intense radioactivity and scarcity, it is primarily utilized in specialized scientific research and studies involving radioactive decay.
What is Ac2O3 used for?
What is the band gap of Ac2O3?
Is Ac2O3 a metal, semiconductor, or insulator?
Is Ac2O3 thermodynamically stable?
What is the crystal structure of Ac2O3?
What is the density of Ac2O3?
How many polymorphs of Ac2O3 are known?
What elements does Ac2O3 contain?
Where does the data for Ac2O3 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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