FeIr
This intermetallic compound consists of iron and iridium. It is primarily studied in the field of materials science for its unique magnetic and structural properties in solid-state research.
Overview
Key Properties
Cross-validated computational properties for FeIr, 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.
0.064 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.
Metastable
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
49
4 databases, 16 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of FeIr. 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 FeIr, 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. |
|---|---|---|---|---|---|
| R-3m (No. 166) | trigonal | 0.00 | 0.0635 | -8.639 | 15.16 |
| R3m (No. 160) | Trigonal | — | — | — | 12.59 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 14.74 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 14.55 |
| P2 (No. 3) | Monoclinic | — | — | — | 6.69 |
| P2 (No. 3) | Monoclinic | — | — | — | 5.94 |
| Pm (No. 6) | Monoclinic | — | — | — | 10.20 |
| Pm (No. 6) | Monoclinic | — | — | — | 8.44 |
| Cm (No. 8) | Monoclinic | — | — | — | 14.53 |
| P2 (No. 3) | Monoclinic | — | — | — | 11.38 |
| P2 (No. 3) | Monoclinic | — | — | — | 8.79 |
| P-1 (No. 2) | Triclinic | — | — | — | 16.92 |
Uses
Applications
Where FeIr is used.
Materials science researchMagnetic property studies
Reference
Frequently Asked Questions
Common questions about FeIr, answered from cross-validated data.
What is FeIr?
This intermetallic compound consists of iron and iridium. It is primarily studied in the field of materials science for its unique magnetic and structural properties in solid-state research.
More questions
What is FeIr used for?
FeIr is used in materials science research and magnetic property studies.
What is the band gap of FeIr?
FeIr is computed to be metallic (no band gap) in the reported DFT structures.
Is FeIr a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is FeIr thermodynamically stable?
FeIr has a lowest energy above hull of 0.064 eV/atom (metastable).
What is the crystal structure of FeIr?
The lowest-energy reported polymorph of FeIr is trigonal symmetry, space group R-3m (No. 166).
What is the density of FeIr?
The computed density of the ground-state structure of FeIr is 15.16 g/cm³.
How many polymorphs of FeIr are known?
49 structures of FeIr are reported across 4 databases, spanning 16 distinct space groups.
What elements does FeIr contain?
FeIr contains Fe and Ir (2 elements).
Where does the data for FeIr come from?
FeIr data is cross-referenced from materials_project, mpaloe.
Explore
Related Compounds
Other Platinum-Group Alloy 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.
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