LuO3
LuO3 is a semiconducting lutetium-oxygen compound that exists as a metastable phase in various structural configurations.
About LuO3
LuO3 is a semiconducting compound composed of lutetium and oxygen. As a complex oxide, it represents an interesting subject for materials research, particularly in the study of rare-earth oxygen systems where various coordination environments can be explored.
Despite its existence in multiple structural databases, this compound is considered thermodynamically unstable relative to its constituent phases. Its semiconducting nature makes it a candidate for fundamental studies in electronic materials science where researchers investigate unconventional stoichiometry.
Key Properties
Cross-validated computational properties for LuO3, 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 LuO3. 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 LuO3, 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. |
|---|---|---|---|---|---|
| Im-3 (No. 204) | cubic | 1.53 | 0.4853 | -1.996 | — |
| P63/mmc (No. 194) | hexagonal | 0.00 | 0.5656 | -6.853 | 9.02 |
| Im-3 (No. 204) | cubic | 1.44 | 0.6446 | -6.774 | 7.15 |
| — | — | 0.00 | 0.7075 | -1.769 | — |
| P63/mmc (No. 194) | hexagonal | 0.00 | 0.7151 | -1.766 | — |
| — | — | 0.00 | 0.7216 | -1.754 | — |
| — | — | 0.00 | 0.7290 | -1.747 | — |
| — | — | 0.00 | 0.7641 | -1.712 | — |
| Cm (No. 8) | monoclinic | — | — | — | 6.51 |
| C2/m (No. 12) | monoclinic | — | — | — | 10.15 |
| C2/m (No. 12) | monoclinic | — | — | — | 8.70 |
| P2/m (No. 10) | monoclinic | — | — | — | 5.98 |
Frequently Asked Questions
Common questions about LuO3, answered from cross-validated data.
What is LuO3?
LuO3 is a semiconducting lutetium-oxygen compound that exists as a metastable phase in various structural configurations.
What is the band gap of LuO3?
Is LuO3 a metal, semiconductor, or insulator?
Is LuO3 thermodynamically stable?
What is the crystal structure of LuO3?
How many polymorphs of LuO3 are known?
What elements does LuO3 contain?
Where does the data for LuO3 come from?
How It Compares
As a rare-earth oxide with a higher oxygen-to-metal ratio than the standard sesquioxide, LuO3 occupies a unique position in the landscape of lutetium-based compounds, representing a metastable phase that challenges standard structural stability expectations.
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)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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