SrMnO3
Strontium manganite
SrMnO3 is a stable, semiconducting perovskite oxide frequently investigated for its catalytic performance in electrochemical oxygen-evolution reactions.
About Strontium manganite
SrMnO3 is a semiconducting oxide that sits firmly on the thermodynamic convex hull, indicating high stability. As a member of the perovskite-related oxide family, it is recognized for its well-defined crystal structure and potential for tuning electronic properties through chemical substitution.
Its role as an oxygen-evolution catalyst makes it a subject of significant interest for electrochemical energy conversion. The material's robust stability and electronic nature allow it to facilitate critical surface reactions, contributing to the development of efficient electrodes for water splitting and other sustainable energy technologies.
Key Properties
Cross-validated computational properties for Strontium manganite, aggregated across 4 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 SrMnO3, 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. |
|---|---|---|---|---|---|
| C2221 (No. 20) | orthorhombic | 0.00 | 0.0000 | -7.639 | 5.13 |
| P63/mmc (No. 194) | hexagonal | 0.90 | 0.0031 | -7.636 | 5.41 |
| P63mc (No. 186) | hexagonal | 0.00 | 0.0126 | -7.626 | 5.15 |
| P63/mmc (No. 194) | hexagonal | 0.00 | 0.0150 | -7.624 | 5.58 |
| Pm-3m (No. 221) | cubic | 0.00 | 0.0492 | -7.590 | 5.46 |
| P63mc (No. 186) | Hexagonal | — | — | — | 5.36 |
| Pm-3m (No. 221) | Cubic | — | — | — | 5.46 |
| P63mc (No. 186) | Hexagonal | — | — | — | 5.61 |
| Pm-3m (No. 221) | — | — | — | — | — |
| C2221 (No. 20) | — | — | — | — | — |
| C2221 (No. 20) | — | — | — | — | — |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 5.50 |
Synthesis Routes
Literature-extracted synthesis procedures targeting SrMnO3.
Applications
Where Strontium manganite is used.
Frequently Asked Questions
Common questions about Strontium manganite, answered from cross-validated data.
What is SrMnO3?
SrMnO3 is a stable, semiconducting perovskite oxide frequently investigated for its catalytic performance in electrochemical oxygen-evolution reactions.
What is SrMnO3 used for?
What is the band gap of SrMnO3?
Is SrMnO3 a metal, semiconductor, or insulator?
Is SrMnO3 thermodynamically stable?
What is the crystal structure of SrMnO3?
What is the density of SrMnO3?
How many polymorphs of SrMnO3 are known?
How is SrMnO3 synthesized?
What elements does SrMnO3 contain?
Where does the data for SrMnO3 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the diverse class of oxygen-evolution catalysts, SrMnO3 distinguishes itself from layered oxides like LiCoO2 and LiNiO2 by its rigid perovskite framework. While materials such as LaMnO3 share similar structural motifs, SrMnO3 offers a unique electronic environment that complements the catalytic activity found in binary systems like NiO or complex spinel structures like LiMn2O4.
Related Compounds
Other Oxide Oxygen-Evolution Catalysts in the database.
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).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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