Sr3La4O9
Sr3La4O9 is a metastable, insulating oxide compound containing strontium and lanthanum.
About Sr3La4O9
Sr3La4O9 is a complex oxide composed of strontium, lanthanum, and oxygen. As a wide-gap insulator, it exhibits distinct electronic properties that make it a subject of interest for fundamental materials research and potential dielectric applications. Its structural complexity is highlighted by the multiple configurations identified in crystallographic databases. Despite its metastable nature, the compound represents a unique phase within the strontium-lanthanum-oxygen system. Understanding its stability and electronic behavior provides valuable insights into the synthesis and phase evolution of multi-component oxide ceramics.
Key Properties
Cross-validated computational properties for Sr3La4O9, aggregated across 2 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 Sr3La4O9, 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. |
|---|---|---|---|---|---|
| Cc (No. 9) | monoclinic | 3.84 | 0.0596 | -7.851 | 6.00 |
| R3 (No. 146) | trigonal | 3.08 | 0.0999 | -7.810 | 5.30 |
| P1 (No. 1) | triclinic | 2.47 | 0.1917 | -7.719 | 4.73 |
| P1 (No. 1) | triclinic | 2.48 | 0.2330 | -7.677 | 4.71 |
| P1 (No. 1) | Triclinic | — | — | — | 4.73 |
| P1 (No. 1) | Triclinic | — | — | — | 4.86 |
| P1 (No. 1) | Triclinic | — | — | — | 4.81 |
| R3 (No. 146) | Trigonal | — | — | — | 5.30 |
| R3 (No. 146) | Trigonal | — | — | — | 5.42 |
| R3 (No. 146) | Trigonal | — | — | — | 5.37 |
| Cc (No. 9) | Monoclinic | — | — | — | 6.00 |
| Cc (No. 9) | Monoclinic | — | — | — | 6.24 |
Applications
Where Sr3La4O9 is used.
Frequently Asked Questions
Common questions about Sr3La4O9, answered from cross-validated data.
What is Sr3La4O9?
Sr3La4O9 is a metastable, insulating oxide compound containing strontium and lanthanum.
What is Sr3La4O9 used for?
What is the band gap of Sr3La4O9?
Is Sr3La4O9 a metal, semiconductor, or insulator?
Is Sr3La4O9 thermodynamically stable?
What is the crystal structure of Sr3La4O9?
What is the density of Sr3La4O9?
How many polymorphs of Sr3La4O9 are known?
What elements does Sr3La4O9 contain?
Where does the data for Sr3La4O9 come from?
How It Compares
As a specialized oxide phase, Sr3La4O9 occupies a unique position in the landscape of complex ternary oxides, serving as a distinct example of the structural diversity possible within this chemical system.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
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