Fe8O9
This compound is a complex iron oxide phase that exists as a non-stoichiometric intermediate during the thermal transformation of iron-based materials. It is primarily studied in the context of materials science research regarding oxidation processes and the formation of magnetic iron oxide phases.
Key Properties
Cross-validated computational properties for Fe8O9, 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 Fe8O9, 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. |
|---|---|---|---|---|---|
| P1 (No. 1) | triclinic | 1.23 | 0.0486 | -8.105 | 5.30 |
| P-1 (No. 2) | triclinic | 1.41 | 0.0613 | -8.092 | 5.33 |
| P-1 (No. 2) | Triclinic | — | — | — | 5.33 |
| P-1 (No. 2) | Triclinic | — | — | — | 6.03 |
| P-1 (No. 2) | — | — | — | — | — |
| P-1 (No. 2) | Triclinic | — | — | — | 5.79 |
Applications
Where Fe8O9 is used.
Frequently Asked Questions
Common questions about Fe8O9, answered from cross-validated data.
What is Fe8O9?
This compound is a complex iron oxide phase that exists as a non-stoichiometric intermediate during the thermal transformation of iron-based materials. It is primarily studied in the context of materials science research regarding oxidation processes and the formation of magnetic iron oxide phases.
What is Fe8O9 used for?
What is the band gap of Fe8O9?
Is Fe8O9 a metal, semiconductor, or insulator?
Is Fe8O9 thermodynamically stable?
What is the crystal structure of Fe8O9?
What is the density of Fe8O9?
How many polymorphs of Fe8O9 are known?
What elements does Fe8O9 contain?
Where does the data for Fe8O9 come from?
Related Compounds
Other Conversion Oxide Anodes 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).
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