FeSn2
FeSn2 is a metallic intermetallic compound formed from iron and tin that is recognized as a likely synthesizable phase for materials research.
About FeSn2
FeSn2 is a metallic intermetallic compound composed of iron and tin. As a near-hull phase, it is considered a promising candidate for experimental synthesis and investigation within materials science laboratories. Its electronic character is defined by its metallic nature, lacking a band gap, which influences its behavior in various solid-state environments. The compound is supported by a significant body of structural data, reflecting its role as a subject of interest in binary alloy studies. Its stability profile suggests it can be reliably accessed for research, making it a valuable system for understanding iron-tin phase interactions and the development of new intermetallic materials. This compound is primarily utilized in fundamental research aimed at exploring the physical properties of metal-rich binary systems.
Key Properties
Cross-validated computational properties for FeSn2, aggregated across 5 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 FeSn2. 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 FeSn2, 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. |
|---|---|---|---|---|---|
| — | — | 0.00 | 0.0000 | -0.048 | — |
| I4/mcm (No. 140) | tetragonal | 0.00 | 0.0140 | -5.484 | 8.36 |
| I4/mcm (No. 140) | tetragonal | 0.00 | 0.0523 | 0.051 | — |
| — | — | 0.00 | 0.0577 | 0.010 | — |
| — | — | 0.00 | 0.8073 | 0.760 | — |
| — | — | 0.00 | 0.9674 | 0.920 | — |
| P-1 (No. 2) | triclinic | — | — | — | 11.27 |
| P1 (No. 1) | triclinic | — | — | — | 8.05 |
| P1 (No. 1) | triclinic | — | — | — | 4.88 |
| P1 (No. 1) | triclinic | — | — | — | 4.16 |
| P-1 (No. 2) | triclinic | — | — | — | 5.35 |
| P-1 (No. 2) | triclinic | — | — | — | 7.74 |
Synthesis Routes
Literature-extracted synthesis procedures targeting FeSn2.
Applications
Where FeSn2 is used.
Frequently Asked Questions
Common questions about FeSn2, answered from cross-validated data.
What is FeSn2?
FeSn2 is a metallic intermetallic compound formed from iron and tin that is recognized as a likely synthesizable phase for materials research.
What is FeSn2 used for?
What is the band gap of FeSn2?
Is FeSn2 a metal, semiconductor, or insulator?
Is FeSn2 thermodynamically stable?
What is the crystal structure of FeSn2?
What is the density of FeSn2?
How many polymorphs of FeSn2 are known?
How is FeSn2 synthesized?
What elements does FeSn2 contain?
Where does the data for FeSn2 come from?
How It Compares
As a binary intermetallic, FeSn2 represents a distinct structural arrangement within the iron-tin system. While it occupies a specific niche in the phase diagram, it serves as a critical reference point for researchers studying the transition metal-post transition metal bonding environment, providing insights into structural stability that inform the broader study of similar intermetallic phases.
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)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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