Sr2Sn
Sr2Sn is a thermodynamically stable semiconducting intermetallic compound composed of strontium and tin.
About Sr2Sn
Sr2Sn is a thermodynamically stable intermetallic compound that sits firmly on the convex hull, indicating significant structural robustness. As a semiconducting material, it represents a specialized electronic phase within the strontium-tin binary system, offering unique charge transport characteristics for fundamental materials science studies.
Given its status as a well-documented phase with numerous reported structures across multiple databases, this compound serves as a critical reference point for understanding the bonding and stability of alkaline-earth stannides. Its electronic nature makes it a subject of interest for researchers investigating the transition between metallic and semiconducting behaviors in binary alloys.
Key Properties
Cross-validated computational properties for Sr2Sn, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Sr2Sn. 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 Sr2Sn, 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. |
|---|---|---|---|---|---|
| — | — | 0.29 | 0.0000 | -0.657 | — |
| Pnma (No. 62) | orthorhombic | 0.24 | 0.0000 | -0.709 | — |
| Pnma (No. 62) | orthorhombic | 0.15 | 0.0000 | -19.073 | 4.25 |
| — | — | 0.00 | 0.8491 | 0.192 | — |
| P-1 (No. 2) | triclinic | — | — | — | 3.14 |
| C2/c (No. 15) | monoclinic | — | — | — | 2.86 |
| P-1 (No. 2) | triclinic | — | — | — | 2.75 |
| P21/c (No. 14) | monoclinic | — | — | — | 2.65 |
| C2 (No. 5) | monoclinic | — | — | — | 3.18 |
| C2/m (No. 12) | monoclinic | — | — | — | 2.84 |
| C2/m (No. 12) | monoclinic | — | — | — | 2.66 |
| C2/m (No. 12) | monoclinic | — | — | — | 2.51 |
Applications
Where Sr2Sn is used.
Frequently Asked Questions
Common questions about Sr2Sn, answered from cross-validated data.
What is Sr2Sn?
Sr2Sn is a thermodynamically stable semiconducting intermetallic compound composed of strontium and tin.
What is Sr2Sn used for?
What is the band gap of Sr2Sn?
Is Sr2Sn a metal, semiconductor, or insulator?
Is Sr2Sn thermodynamically stable?
What is the crystal structure of Sr2Sn?
How many polymorphs of Sr2Sn are known?
What elements does Sr2Sn contain?
Where does the data for Sr2Sn come from?
How It Compares
As a stable semiconducting intermetallic, Sr2Sn occupies a distinct niche in the landscape of binary stannides, where it is valued for its thermodynamic reliability and structural diversity compared to more transient or metastable phases within the broader class of strontium-based alloys.
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)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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