La2SiO5
La2SiO5 is a stable, insulating crystalline compound used in advanced dielectric and optical technologies.
About La2SiO5
La2SiO5 is a thermodynamically stable crystalline compound that exists as a wide-band-gap insulator. Its structural integrity is well-documented, with numerous reported configurations across major materials databases, highlighting its reliability for high-performance applications.
This material is primarily valued for its insulating properties and chemical stability. It serves as a critical component in research areas focusing on advanced dielectric materials and optical components where precise electronic control is required.
Key Properties
Cross-validated computational properties for La2SiO5, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of La2SiO5. 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 La2SiO5, 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. |
|---|---|---|---|---|---|
| — | — | 4.61 | 0.0000 | -3.606 | — |
| P21/c (No. 14) | monoclinic | 4.57 | 0.0000 | -3.576 | — |
| P21/c (No. 14) | monoclinic | 4.48 | 0.0000 | -8.783 | 5.48 |
| — | — | 4.85 | 0.0168 | -3.590 | — |
| C2/c (No. 15) | monoclinic | 4.50 | 0.0216 | -8.762 | 5.21 |
| C2/c (No. 15) | monoclinic | 4.06 | 0.0497 | -8.733 | 4.78 |
| P21/c (No. 14) | monoclinic | — | — | — | 5.57 |
| P21/c (No. 14) | monoclinic | — | — | — | 5.43 |
| C2/c (No. 15) | monoclinic | — | — | — | 5.04 |
| P21/c (No. 14) | monoclinic | — | — | — | 5.35 |
| C2/c (No. 15) | monoclinic | — | — | — | 5.25 |
| C2/c (No. 15) | monoclinic | — | — | — | 5.12 |
Synthesis Routes
Literature-extracted synthesis procedures targeting La2SiO5.
Applications
Where La2SiO5 is used.
Frequently Asked Questions
Common questions about La2SiO5, answered from cross-validated data.
What is La2SiO5?
La2SiO5 is a stable, insulating crystalline compound used in advanced dielectric and optical technologies.
What is La2SiO5 used for?
What is the band gap of La2SiO5?
Is La2SiO5 a metal, semiconductor, or insulator?
Is La2SiO5 thermodynamically stable?
What is the crystal structure of La2SiO5?
How many polymorphs of La2SiO5 are known?
How is La2SiO5 synthesized?
What elements does La2SiO5 contain?
Where does the data for La2SiO5 come from?
How It Compares
As a thermodynamically stable member of the lanthanum silicate family, La2SiO5 represents a foundational material for dielectric research. It serves as a benchmark for stability and performance within its class, providing a robust framework for developing next-generation electronic and optical devices.
Data sources & attribution
- 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)
- 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)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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