Sr2LaMn2O7
Sr2LaMn2O7 is a metastable semiconducting complex oxide composed of strontium, lanthanum, manganese, and oxygen.
About Sr2LaMn2O7
Sr2LaMn2O7 is a complex oxide featuring strontium, lanthanum, manganese, and oxygen. As a semiconducting material, it exhibits specific electronic characteristics that make it a subject of interest for fundamental studies in solid-state chemistry and materials science.
While classified as a metastable phase, this compound has been documented across multiple structural databases, reflecting a significant degree of academic interest. Its ability to adopt various configurations highlights the complex structural landscape inherent to these types of mixed-metal oxides.
Key Properties
Cross-validated computational properties for Sr2LaMn2O7, 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 Sr2LaMn2O7, 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. |
|---|---|---|---|---|---|
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.0682 | -7.952 | 5.73 |
| Immm (No. 71) | orthorhombic | 0.00 | 0.0735 | -7.946 | 5.73 |
| Cmcm (No. 63) | orthorhombic | 0.87 | 0.0787 | -7.941 | 5.73 |
| Cmmm (No. 65) | orthorhombic | 0.51 | 0.0790 | -7.941 | 5.73 |
| I4mm (No. 107) | tetragonal | 0.00 | 0.0795 | -7.940 | 5.70 |
| Cm (No. 8) | monoclinic | 0.00 | 0.0936 | -7.926 | 5.72 |
| C2 (No. 5) | monoclinic | 0.57 | 0.0954 | -7.924 | 5.70 |
| Amm2 (No. 38) | Orthorhombic | — | — | — | 5.96 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 5.96 |
| Immm (No. 71) | Orthorhombic | — | — | — | 5.73 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 6.10 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 6.00 |
Applications
Where Sr2LaMn2O7 is used.
Frequently Asked Questions
Common questions about Sr2LaMn2O7, answered from cross-validated data.
What is Sr2LaMn2O7?
Sr2LaMn2O7 is a metastable semiconducting complex oxide composed of strontium, lanthanum, manganese, and oxygen.
What is Sr2LaMn2O7 used for?
What is the band gap of Sr2LaMn2O7?
Is Sr2LaMn2O7 a metal, semiconductor, or insulator?
Is Sr2LaMn2O7 thermodynamically stable?
What is the crystal structure of Sr2LaMn2O7?
What is the density of Sr2LaMn2O7?
How many polymorphs of Sr2LaMn2O7 are known?
What elements does Sr2LaMn2O7 contain?
Where does the data for Sr2LaMn2O7 come from?
How It Compares
As a unique complex oxide, Sr2LaMn2O7 serves as a representative example of the structural diversity found in lanthanum-strontium-manganese systems. It occupies a distinct niche in materials research, where its metastable nature allows for the exploration of phase transitions and electronic properties that are not typically accessible in more stable, ground-state counterparts.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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