CoSn
cobalt stannide · cobalt mono-stannide
CoSn is a stable metallic compound formed from cobalt and tin that is widely studied for its structural characteristics in materials science.
About cobalt stannide
CoSn is a metallic intermetallic compound composed of cobalt and tin. As a thermodynamically stable phase located on the convex hull, it represents a robust crystalline structure that maintains its integrity under standard conditions.
Due to its metallic nature and structural stability, this compound serves as a significant subject in solid-state chemistry and materials science. It is frequently investigated for its unique atomic arrangement and potential utility in specialized metallurgical applications.
Key Properties
Cross-validated computational properties for cobalt stannide, 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.
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 CoSn. 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 CoSn, 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. |
|---|---|---|---|---|---|
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.0000 | -5.667 | 8.87 |
| — | — | 0.00 | 0.0000 | -0.162 | — |
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.0000 | -0.097 | — |
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.0005 | -0.097 | — |
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.0007 | -0.097 | — |
| P6/mmm (No. 191) | hexagonal | 0.00 | 0.0124 | -0.085 | — |
| — | — | 0.00 | 0.2540 | 0.092 | — |
| — | — | 0.00 | 0.2550 | 0.093 | — |
| — | — | 0.00 | 0.2652 | 0.103 | — |
| — | — | 0.00 | 0.3011 | 0.139 | — |
| — | — | 0.00 | 0.3475 | 0.185 | — |
| — | — | 0.00 | 0.4543 | 0.292 | — |
Applications
Where cobalt stannide is used.
Frequently Asked Questions
Common questions about cobalt stannide, answered from cross-validated data.
What is CoSn?
CoSn is a stable metallic compound formed from cobalt and tin that is widely studied for its structural characteristics in materials science.
What is CoSn used for?
What is the band gap of CoSn?
Is CoSn a metal, semiconductor, or insulator?
Is CoSn thermodynamically stable?
What is the crystal structure of CoSn?
What is the density of CoSn?
How many polymorphs of CoSn are known?
What elements does CoSn contain?
Where does the data for CoSn come from?
How It Compares
As a stable intermetallic phase, CoSn represents a fundamental building block in the cobalt-tin binary system. It serves as a primary reference point for understanding the formation and stability of metal-rich stannides in this class of materials.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- 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)
- 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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