Fe2Mn4O8
Fe2Mn4O8 is a semiconducting iron-manganese oxide that serves as a metastable candidate for oxygen-evolution catalysis.
About Fe2Mn4O8
Fe2Mn4O8 is a complex oxide composed of iron, manganese, and oxygen that functions as a semiconducting material. Its electronic properties and structural arrangement make it a subject of interest for researchers investigating efficient pathways for oxygen evolution reactions.
As a metastable phase, this compound represents a unique configuration within the broader family of transition metal oxides. Its existence across multiple reported structural forms highlights its versatility and the ongoing scientific efforts to stabilize and utilize such materials in catalytic applications.
Key Properties
Cross-validated computational properties for Fe2Mn4O8, 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 Fe2Mn4O8, 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. |
|---|---|---|---|---|---|
| I41/amd (No. 141) | tetragonal | 0.00 | 0.0418 | -8.557 | 4.71 |
| Imma (No. 74) | orthorhombic | 0.00 | 0.0587 | -8.540 | 4.69 |
| Cm (No. 8) | monoclinic | 0.19 | 0.0794 | -8.519 | 4.71 |
| Imma (No. 74) | orthorhombic | 0.00 | 0.1393 | -8.459 | 4.69 |
| Fd-3m (No. 227) | — | — | — | — | — |
| — | — | — | — | — | 3.08 |
Applications
Where Fe2Mn4O8 is used.
Frequently Asked Questions
Common questions about Fe2Mn4O8, answered from cross-validated data.
What is Fe2Mn4O8?
Fe2Mn4O8 is a semiconducting iron-manganese oxide that serves as a metastable candidate for oxygen-evolution catalysis.
What is Fe2Mn4O8 used for?
What is the band gap of Fe2Mn4O8?
Is Fe2Mn4O8 a metal, semiconductor, or insulator?
Is Fe2Mn4O8 thermodynamically stable?
What is the crystal structure of Fe2Mn4O8?
What is the density of Fe2Mn4O8?
How many polymorphs of Fe2Mn4O8 are known?
What elements does Fe2Mn4O8 contain?
Where does the data for Fe2Mn4O8 come from?
How It Compares
Within the oxide oxygen-evolution catalysts class.
Within the class of oxygen-evolution catalysts, Fe2Mn4O8 occupies a distinct niche compared to more established materials like LiMn2O4 or LaMnO3. While many members of this group are well-characterized, stable perovskites or spinels, Fe2Mn4O8 is distinguished by its metastable nature, offering a different structural landscape for tuning catalytic activity compared to the highly studied LiCoO2 or NiO.
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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