La2Ti2O7
Lanthanum dititanate · LTO
La2Ti2O7 is a stable semiconducting perovskite oxide used in advanced dielectric and photocatalytic applications.
About Lanthanum dititanate
Lanthanum dititanate is a thermodynamically stable perovskite oxide that exhibits semiconducting electronic behavior. Its robust structural framework makes it a subject of significant interest for researchers exploring complex oxide materials with high chemical durability.
This compound is primarily utilized in the development of high-performance dielectric materials and as a candidate for photocatalytic applications. Its ability to maintain structural integrity under various conditions positions it as a valuable component in modern materials engineering.
Key Properties
Cross-validated computational properties for Lanthanum dititanate, 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 La2Ti2O7, 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. |
|---|---|---|---|---|---|
| Pna21 (No. 33) | orthorhombic | 2.93 | 0.0000 | -9.266 | 5.79 |
| P21 (No. 4) | monoclinic | 2.92 | 0.0005 | -9.265 | 5.79 |
| Cmc21 (No. 36) | orthorhombic | 2.92 | 0.0081 | -9.258 | 5.78 |
| Fd-3m (No. 227) | cubic | 2.75 | 0.0504 | -9.215 | 5.59 |
| P21 (No. 4) | monoclinic | — | — | — | 2.89 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 1.40 |
| Fd-3m (No. 227) | Cubic | — | — | — | 5.69 |
| Fd-3m (No. 227) | Cubic | — | — | — | 5.82 |
| Fd-3m (No. 227) | Cubic | — | — | — | 5.59 |
Applications
Where Lanthanum dititanate is used.
Frequently Asked Questions
Common questions about Lanthanum dititanate, answered from cross-validated data.
What is La2Ti2O7?
La2Ti2O7 is a stable semiconducting perovskite oxide used in advanced dielectric and photocatalytic applications.
What is La2Ti2O7 used for?
What is the band gap of La2Ti2O7?
Is La2Ti2O7 a metal, semiconductor, or insulator?
Is La2Ti2O7 thermodynamically stable?
What is the crystal structure of La2Ti2O7?
What is the density of La2Ti2O7?
How many polymorphs of La2Ti2O7 are known?
What elements does La2Ti2O7 contain?
Where does the data for La2Ti2O7 come from?
How It Compares
Within the perovskite oxides class.
Within the diverse family of perovskite oxides, La2Ti2O7 distinguishes itself through its stable semiconducting nature, contrasting with the metallic character often found in LaNiO3 or the magnetic properties typical of LaMnO3 and LaFeO3. While materials like BaTiO3 are widely recognized for their ferroelectric applications, La2Ti2O7 is valued for its unique structural stability and potential in specialized electronic and optical device architectures.
Related Compounds
Other Perovskite Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- mpaloe — Data from mpaloe.
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