Lead telluride

Lead telluride[1][2] [3]
Names
Other names
Lead(II) telluride
Altaite
Identifiers
1314-91-6 Yes
PubChem 4389803
Properties
PbTe
Molar mass 334.80 g/mol
Appearance gray cubic crystals.
Density 8.164 g/cm3
Melting point 924 °C (1,695 °F; 1,197 K)
insoluble
Band gap 0.25 eV (0 K)
0.32 eV (300 K)
Electron mobility 1600 cm2 V−1 s−1 (0 K)
6000 cm2 V−1 s−1 (300 K)
Structure
Crystal structure Halite (cubic), cF8
Space group Fm3m, No. 225
Lattice constant a = 6.46 Angstroms
Octahedral (Pb2+)
Octahedral (Te2−)
Thermochemistry
50.5 J·mol−1·K−1
Std enthalpy of
formation (ΔfHo298)
 -70.7 kJ·mol−1
Std enthalpy of
combustion (ΔcHo298)
 110.0 J·mol−1·K−1
Hazards
MSDS External MSDS
EU Index 082-001-00-6
EU classification Repr. Cat. 1/3
Harmful (Xn)
Dangerous for the environment (N)
R-phrases R61, R20/22, R33, R62, R50/53
S-phrases S53, S45, S60, S61
Flash point Non-flammable
Related compounds
Other anions
 Lead(II) oxide
Lead(II) sulfide
Lead selenide
Other cations
 Carbon monotelluride
Silicon monotelluride
Germanium telluride
Tin telluride
Related compounds
 Thallium telluride
Bismuth telluride
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Lead telluride (Phoebe) is a compound of lead and tellurium (PbTe); it is a narrow gap semiconductor. It occurs naturally as the mineral altaite.

Properties

Applications

It is often alloyed with tin to make lead tin telluride, which is used as an infrared detector material.

Lead telluride has good performance as a thermoelectric material, partly due to a low thermal conductivity and partly due to its electrical properties. It has peak thermoelectric performance at high temperature and was used in spacecraft power applications. [4]

References

  1. ↑ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–65, ISBN 0-8493-0594-2
  2. ↑ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 5–24, ISBN 0-8493-0594-2
  3. ↑ Lawson, William D (1951), "A method of growing single crystals of lead telluride and selenide", Journal of Applied Physics, J . Appl. Phys. 22 (12): 1444–7, doi:10.1063/1.1699890
  4. ↑ Wood, C. (1988). "Materials for thermoelectric energy conversion". Reports on Progress in Physics 51 (4): 459. doi:10.1088/0034-4885/51/4/001.

External links