La2O3
Lanthanum oxide · Lanthanum sesquioxide
Lanthanum oxide is a stable, insulating rare-earth compound widely used in the manufacturing of specialty glass and advanced electronic components.
About Lanthanum oxide
Lanthanum oxide is a thermodynamically stable compound that serves as a foundational material in the rare-earth oxide family. Its insulating nature and structural robustness make it a critical component for high-index glass and advanced ceramic applications.
Due to its extensive research history and high structural diversity, this compound is widely utilized in industrial catalysis and as a precursor for various electronic materials. Its ability to maintain stability under diverse conditions ensures its continued relevance in modern materials science.
Key Properties
Cross-validated computational properties for Lanthanum oxide, aggregated across 6 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 La2O3. 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 La2O3, 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 | 3.88 | 0.0000 | -3.719 | — |
| P-3m1 (No. 164) | trigonal | 3.83 | 0.0000 | -8.819 | 6.62 |
| — | — | 3.81 | 0.0000 | -3.713 | — |
| Ia-3 (No. 206) | cubic | 3.53 | 0.0018 | -8.817 | 5.90 |
| — | — | 3.94 | 0.0248 | -3.688 | — |
| — | — | 3.55 | 0.0297 | -3.683 | — |
| C2/m (No. 12) | monoclinic | 3.41 | 0.0314 | -8.788 | 6.38 |
| — | — | 3.94 | 0.0564 | -3.656 | — |
| — | — | 2.52 | 0.1077 | -3.605 | — |
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.2357 | -8.583 | 4.68 |
| — | — | 1.58 | 0.2372 | -3.475 | — |
| P-62m (No. 189) | hexagonal | 1.53 | 0.2422 | -8.577 | 4.82 |
Synthesis Routes
Literature-extracted synthesis procedures targeting La2O3.
Applications
Where Lanthanum oxide is used.
Patent Landscape
2 patents reference La2O3 or close compositional variants.
| Patent | Title | Assignee | Granted |
|---|---|---|---|
| 7258707 | AI2O3-La2O3-Y2O3-MgO ceramics, and methods of making the same | — | — |
| 10388484 | Carburized La2O3 and Lu2O3 co-doped Mo filament cathode | — | — |
Frequently Asked Questions
Common questions about Lanthanum oxide, answered from cross-validated data.
What is La2O3?
Lanthanum oxide is a stable, insulating rare-earth compound widely used in the manufacturing of specialty glass and advanced electronic components.
What is La2O3 used for?
What is the band gap of La2O3?
Is La2O3 a metal, semiconductor, or insulator?
Is La2O3 thermodynamically stable?
What is the crystal structure of La2O3?
What is the density of La2O3?
How many polymorphs of La2O3 are known?
How is La2O3 synthesized?
What elements does La2O3 contain?
Where does the data for La2O3 come from?
How It Compares
As a primary lanthanum-based oxide, this compound serves as a benchmark for stability and performance within its chemical class, providing a reliable foundation for the development of more complex rare-earth material systems.
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)
- aflow — Data from AFLOW (aflow.org). Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012). (CC-BY-4.0)
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