Bi2Te2S
bismuth telluride sulfide
Bismuth telluride sulfide is a crystalline inorganic compound that belongs to the class of topological insulators. It is primarily studied for its unique electronic properties and potential for advanced semiconductor and thermoelectric research.
Key Properties
Cross-validated computational properties for Bi2Te2S, 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.
Reported Structures
Lowest-energy structures reported for Bi2Te2S, 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 | 0.44 | 0.0000 | -35.507 | 7.09 |
| R3m (No. 160) | trigonal | 0.75 | 0.0523 | -35.454 | 7.22 |
| C2/m (No. 12) | monoclinic | 0.08 | 0.2337 | -35.273 | 6.48 |
| P-1 (No. 2) | triclinic | 0.14 | 0.2805 | -35.226 | 6.44 |
| R-3m (No. 166) | — | — | — | — | — |
| R3m (No. 160) | Trigonal | — | — | — | 7.30 |
| R3m (No. 160) | Trigonal | — | — | — | 7.22 |
| R3m (No. 160) | Trigonal | — | — | — | 7.36 |
Applications
Where Bi2Te2S is used.
Frequently Asked Questions
Common questions about Bi2Te2S, answered from cross-validated data.
What is Bi2Te2S?
Bismuth telluride sulfide is a crystalline inorganic compound that belongs to the class of topological insulators. It is primarily studied for its unique electronic properties and potential for advanced semiconductor and thermoelectric research.
What is Bi2Te2S used for?
What is the band gap of Bi2Te2S?
Is Bi2Te2S a metal, semiconductor, or insulator?
Is Bi2Te2S thermodynamically stable?
What is the crystal structure of Bi2Te2S?
What is the density of Bi2Te2S?
How many polymorphs of Bi2Te2S are known?
What elements does Bi2Te2S contain?
Where does the data for Bi2Te2S come from?
Related Compounds
Other Bismuth Chalcogenide Thermoelectrics in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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