AlFe
Iron aluminide
AlFe is an intermetallic compound formed from aluminum and iron. It is primarily studied for its potential as a structural material in high-temperature environments due to its resistance to oxidation and corrosion.
AlFe
Overview
Key Properties
Cross-validated computational properties for AlFe, 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.
Metallic / not reported
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
62
4 databases, 20 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of AlFe. 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.
1.00 / 1.00
Trust tier: medium
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
0.000 eV
EAH spread across sources
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
2
jarvis, materials_project
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
All match
Crystallography
Reported Structures
Lowest-energy structures reported for AlFe, 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. |
|---|---|---|---|---|---|
| Pm-3m (No. 221) | cubic | 0.00 | 0.0000 | -6.435 | 5.97 |
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.7879 | -5.647 | 4.61 |
| P1 (No. 1) | Triclinic | — | — | — | 3.88 |
| P6/mmm (No. 191) | — | — | — | — | — |
| P6/mmm (No. 191) | — | — | — | — | — |
| P21/m (No. 11) | Monoclinic | — | — | — | 2.95 |
| P21/m (No. 11) | Monoclinic | — | — | — | 3.60 |
| P21/m (No. 11) | Monoclinic | — | — | — | 3.91 |
| Pm (No. 6) | Monoclinic | — | — | — | 2.49 |
| Pm (No. 6) | Monoclinic | — | — | — | 3.15 |
| Pm (No. 6) | Monoclinic | — | — | — | 3.72 |
| P63mc (No. 186) | Hexagonal | — | — | — | 2.94 |
Uses
Applications
Where AlFe is used.
High-temperature structural componentsCorrosion-resistant coatingsAutomotive exhaust systemsAerospace engineering research
Reference
Frequently Asked Questions
Common questions about AlFe, answered from cross-validated data.
What is AlFe?
AlFe is an intermetallic compound formed from aluminum and iron. It is primarily studied for its potential as a structural material in high-temperature environments due to its resistance to oxidation and corrosion.
More questions
What is AlFe used for?
AlFe is used in high-temperature structural components, corrosion-resistant coatings, automotive exhaust systems, and aerospace engineering research.
What is the band gap of AlFe?
AlFe is computed to be metallic (no band gap) in the reported DFT structures.
Is AlFe a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is AlFe thermodynamically stable?
Yes — AlFe sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of AlFe?
The lowest-energy reported polymorph of AlFe is cubic symmetry, space group Pm-3m (No. 221).
What is the density of AlFe?
The computed density of the ground-state structure of AlFe is 5.97 g/cm³.
How many polymorphs of AlFe are known?
62 structures of AlFe are reported across 4 databases, spanning 20 distinct space groups.
What elements does AlFe contain?
AlFe contains Al and Fe (2 elements).
Where does the data for AlFe come from?
AlFe data is cross-referenced from materials_project, mpaloe, jarvis.
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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