Sr2Fe2O5
Strontium ferrite · SrFeO2.5
Sr2Fe2O5 is a stable, semiconducting iron-based oxide used as a catalyst for oxygen-evolution reactions in electrochemical applications.
About Strontium ferrite
Sr2Fe2O5 is a thermodynamically stable oxide that belongs to the class of oxygen-evolution catalysts. As a semiconducting material, it is characterized by a robust structural framework that has been extensively documented across multiple crystallographic databases. Its ability to facilitate oxygen-related redox reactions makes it a subject of significant interest in materials science research. The compound is primarily utilized in the development of electrochemical systems where stable, efficient catalysts are required. By leveraging its electronic properties, researchers aim to improve the performance of oxygen-evolution processes in various energy conversion and storage technologies.
Key Properties
Cross-validated computational properties for Strontium ferrite, 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 Sr2Fe2O5. 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 Sr2Fe2O5, 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. |
|---|---|---|---|---|---|
| — | — | 0.31 | 0.0000 | -2.333 | — |
| Pbcm (No. 57) | orthorhombic | 0.00 | 0.0005 | -7.379 | 5.05 |
| Ima2 (No. 46) | orthorhombic | 0.38 | 0.0009 | -7.378 | 5.00 |
| Ima2 (No. 46) | orthorhombic | 0.00 | 0.0119 | -2.238 | — |
| C2/m (No. 12) | monoclinic | 0.68 | 0.0166 | -7.363 | 4.79 |
| Fmmm (No. 69) | orthorhombic | 0.00 | 0.0312 | -12.202 | 5.00 |
| — | — | 0.00 | 0.0551 | -2.278 | — |
| — | — | 0.00 | 1.1299 | -1.204 | — |
| Ima2 (No. 46) | orthorhombic | — | — | — | 4.99 |
| C2/m (No. 12) | monoclinic | — | — | — | 4.79 |
| C2/m (No. 12) | monoclinic | — | — | — | 5.03 |
| Ima2 (No. 46) | orthorhombic | — | — | — | 4.79 |
Synthesis Routes
Literature-extracted synthesis procedures targeting Sr2Fe2O5.
Applications
Where Strontium ferrite is used.
Frequently Asked Questions
Common questions about Strontium ferrite, answered from cross-validated data.
What is Sr2Fe2O5?
Sr2Fe2O5 is a stable, semiconducting iron-based oxide used as a catalyst for oxygen-evolution reactions in electrochemical applications.
What is Sr2Fe2O5 used for?
What is the band gap of Sr2Fe2O5?
Is Sr2Fe2O5 a metal, semiconductor, or insulator?
Is Sr2Fe2O5 thermodynamically stable?
What is the crystal structure of Sr2Fe2O5?
What is the density of Sr2Fe2O5?
How many polymorphs of Sr2Fe2O5 are known?
How is Sr2Fe2O5 synthesized?
What elements does Sr2Fe2O5 contain?
Where does the data for Sr2Fe2O5 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the diverse group of oxygen-evolution catalysts, Sr2Fe2O5 distinguishes itself through its thermodynamic stability on the convex hull compared to more complex layered oxides like LiCoO2 or LaNiO3. While materials such as NiO are frequently utilized for their simple binary structure, Sr2Fe2O5 offers a more intricate lattice that provides unique pathways for oxygen transport and catalytic activity, positioning it as a distinct alternative to perovskite-related oxides like LaMnO3 or BiFeO3.
Related Compounds
Other Oxide Oxygen-Evolution Catalysts in the database.
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)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (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)
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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