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Lead(II) telluride

Lead(II) telluride
Other names Lead telluride
CAS number 1314-91-6
Molecular formula PbTe
Molar mass 334.80 g/mol
Density 8160 kg.m-3
Melting point

924 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Lead telluride is a compound of lead and tellurium (PbTe); it is a narrow gap semiconductor. The CAS registry number is 1314-91-6.



  • Dielectric constant ~1000.
  • Electron Effective mass ~ 0.01me
  • Energy gap, ΔEg=0.25 eV|T=0 K; 0.32 eV|T=300 K
  • Electron mobility, μn=1600 cm²/(V.s)>|T=0 K6000 cm²/(V.s)>|T=300 K
  • Hole mobility, μp=600 cm²/(V.s)>|T=0 K4000 cm²/(V.s)>|T=300 K


It is often alloyed with tin to make lead tin telluride, which is used as an infrared detector material. It also has good performance as a thermoelectric material, partly due to a low thermal conductivity.

It occurs naturally as the mineral altaite.

See also


    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lead(II)_telluride". A list of authors is available in Wikipedia.
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