Sn2Tl2
Sn2Tl2 is a metallic tin-thallium compound that exists in a metastable state with diverse structural possibilities.
About Sn2Tl2
Sn2Tl2 is a metallic intermetallic compound composed of tin and thallium. Due to its electronic character, it exhibits conductive properties typical of metallic systems, though it is characterized by a lack of a band gap.
This material is noted for its structural diversity, with numerous reported configurations across multiple databases. However, it sits above the thermodynamic hull, suggesting it is a metastable or unstable phase that requires specific synthesis conditions to exist.
Key Properties
Cross-validated computational properties for Sn2Tl2, 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.
Reported Structures
Lowest-energy structures reported for Sn2Tl2, 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. |
|---|---|---|---|---|---|
| Cm (No. 8) | monoclinic | 0.00 | 0.1327 | -38.830 | 9.27 |
| P4/mmm (No. 123) | tetragonal | 0.00 | 0.1357 | -38.827 | 9.26 |
| Cmcm (No. 63) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 19.67 |
| P4/nmm (No. 129) | — | — | — | — | — |
| — | — | — | — | — | 9.23 |
| Pmma (No. 51) | — | — | — | — | — |
| Pmmn (No. 59) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Fd-3m (No. 227) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Sn2Tl2, answered from cross-validated data.
What is Sn2Tl2?
Sn2Tl2 is a metallic tin-thallium compound that exists in a metastable state with diverse structural possibilities.
What is the band gap of Sn2Tl2?
Is Sn2Tl2 a metal, semiconductor, or insulator?
Is Sn2Tl2 thermodynamically stable?
What is the crystal structure of Sn2Tl2?
What is the density of Sn2Tl2?
How many polymorphs of Sn2Tl2 are known?
What elements does Sn2Tl2 contain?
Where does the data for Sn2Tl2 come from?
How It Compares
As a unique intermetallic phase, Sn2Tl2 represents a complex combination of post-transition metals. Without established siblings in this specific classification, it serves as a case study for understanding the structural landscape of tin-thallium alloys and the challenges of stabilizing such metallic phases.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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