K2La2O8Ti2
K2La2O8Ti2 is a stable, lead-free semiconducting oxide studied for its potential use in piezoelectric and electromechanical technologies.
About K2La2O8Ti2
K2La2O8Ti2 is a complex oxide belonging to the class of lead-free piezoelectric materials. Characterized by its semiconducting electronic nature, this compound is distinguished by its thermodynamic stability, as it resides on the convex hull of its constituent elements. Its structural integrity and chemical composition make it a subject of interest for researchers seeking environmentally benign alternatives to traditional lead-based ceramics.
This material is primarily investigated for its potential in electromechanical applications where lead-free performance is required. Given its status as a stable phase with multiple documented structural configurations, it serves as a valuable candidate for exploring piezoelectric properties in complex oxide systems that avoid the toxicity associated with conventional piezoelectric materials.
Key Properties
Cross-validated computational properties for K2La2O8Ti2, 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 K2La2O8Ti2, 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. |
|---|---|---|---|---|---|
| P4/nmm (No. 129) | tetragonal | 2.34 | 0.0000 | -8.208 | 4.72 |
| Pbcm (No. 57) | orthorhombic | 2.35 | 0.0001 | -8.208 | 4.75 |
| — | — | — | — | — | 4.72 |
| P4/nmm (No. 129) | — | — | — | — | — |
Applications
Where K2La2O8Ti2 is used.
Frequently Asked Questions
Common questions about K2La2O8Ti2, answered from cross-validated data.
What is K2La2O8Ti2?
K2La2O8Ti2 is a stable, lead-free semiconducting oxide studied for its potential use in piezoelectric and electromechanical technologies.
What is K2La2O8Ti2 used for?
What is the band gap of K2La2O8Ti2?
Is K2La2O8Ti2 a metal, semiconductor, or insulator?
Is K2La2O8Ti2 thermodynamically stable?
What is the crystal structure of K2La2O8Ti2?
What is the density of K2La2O8Ti2?
How many polymorphs of K2La2O8Ti2 are known?
What elements does K2La2O8Ti2 contain?
Where does the data for K2La2O8Ti2 come from?
How It Compares
Within the lead-free piezoelectrics class.
Within the diverse landscape of lead-free piezoelectrics, K2La2O8Ti2 occupies a distinct niche compared to well-established perovskites like BaTiO3 or KNbO3. While BaTiO3 is widely recognized for its robust ferroelectric response, K2La2O8Ti2 offers a different structural complexity that expands the library of available lead-free candidates, providing a unique alternative to simpler titanates and niobates like NaTaO3 or Na2TiO3.
Related Compounds
Other Lead-Free Piezoelectrics in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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