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Tin telluride information


Tin telluride[1]
Names
IUPAC name
Tin telluride
Other names
Tin(II) telluride, Stannous telluride
Identifiers
CAS Number
  • 12040-02-7 checkY
3D model (JSmol)
  • Interactive image
ECHA InfoCard 100.031.728 Edit this at Wikidata
PubChem CID
  • 6432000
CompTox Dashboard (EPA)
  • DTXSID40894844 Edit this at Wikidata
InChI
  • InChI=1S/Sn.Te
SMILES
  • [Sn]=[Te]
Properties
Chemical formula
SnTe
Molar mass 246.31 g/mol
Appearance gray cubic crystals
Density 6.445 g/cm3 [2]
Melting point 790 °C (1,450 °F; 1,060 K)
Band gap 0.18 eV [3]
Electron mobility 500 cm2 V−1 s−1
Structure
Crystal structure
Halite (cubic), cF8
Space group
Fm3m, No. 225
Lattice constant
a = 0.63 nm
Coordination geometry
Octahedral (Sn2+)
Octahedral (Se2−)
Thermochemistry
Heat capacity (C)
185 J K−1 kg−1
Related compounds
Other anions
Tin(II) oxide
Tin(II) sulfide
Tin selenide
Other cations
Carbon monotelluride
Silicon monotelluride
Germanium telluride
Lead telluride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Tin telluride is a compound of tin and tellurium (SnTe); is a IV-VI narrow band gap semiconductor and has direct band gap of 0.18 eV. It is often alloyed with lead to make lead tin telluride, which is used as an infrared detector material.

Tin telluride normally forms p-type semiconductor (Extrinsic semiconductor) due to tin vacancies and is a low temperature superconductor.[4]

SnTe exists in three crystal phases. At Low temperatures, where the concentration of hole carriers is less than 1.5x1020 cm−3 , Tin Telluride exists in rhombohedral phase also known as α-SnTe. At room temperature and atmospheric pressure, Tin Telluride exists in NaCl-like cubic crystal phase, known as β-SnTe. While at 18 kbar pressure, β-SnTe transforms to γ-SnTe, orthorhombic phase, space group Pnma.[5] This phase change is characterized by 11 percent increase in density and 360 percent increase in resistance for γ-SnTe.[6]

Tin telluride is a thermoelectric material. Theoretical studies imply that the n-type performance may be particularly good.[7]

  1. ^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–90, ISBN 978-0-8493-0594-8
  2. ^ Beattie, A. G., J. Appl. Phys., 40, 4818–4821, 1969.
  3. ^ O. Madelung, U. Rössler, M. Schulz; SpringerMaterials; sm_lbs_978-3-540-31360-1_859 (Springer-Verlag GmbH, Heidelberg, 1998), http://materials.springer.com/lb/docs/sm_lbs_978-3-540-31360-1_859;
  4. ^ Hein, R.; Meijer, P. (1969). "Critical Magnetic Fields of Superconducting SnTe". Physical Review. 179 (2): 497. Bibcode:1969PhRv..179..497H. doi:10.1103/PhysRev.179.497.
  5. ^ "Tin telluride (Sn Te) crystal structure, lattice parameters". Non-Tetrahedrally Bonded Elements and Binary Compounds I. Landolt-Börnstein - Group III Condensed Matter. Vol. 41C. 1998. pp. 1–8. doi:10.1007/10681727_862. ISBN 978-3-540-64583-2.
  6. ^ Kafalas, J. A.; Mariano, A. N., High-Pressure Phase Transition in Tin Telluride. Science 1964, 143 (3609), 952-952
  7. ^ Singh, D. J. (2010). "THERMOPOWER OF SnTe FROM BOLTZMANN TRANSPORT CALCULATIONS". Functional Materials Letters. 03 (4): 223–226. arXiv:1006.4151. doi:10.1142/S1793604710001299. S2CID 119223416.

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