Lead(II) telluride

Chembox new
Name = Lead(II) telluride
ImageFile = Lead(II) telluride.jpg
ImageName = Lead(II) telluride
OtherNames = Lead telluride
Section1 = Chembox Identifiers
CASNo = 1314-91-6
Section2 = Chembox Properties
Formula = PbTe
MolarMass = 334.80 g/mol
Density = 8160 kg.m^-3
Solvent =
SolubleOther =
MeltingPt = 924 °C
BoilingPt =

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

Properties

* Dielectric constant ~1000.
* Electron Effective mass ~ 0.01m_e
* Energy gap, ΔE_g=0.25 eV|_{T=0 K}; 0.32 eV|_{T=300 K}
* Electron mobility, μ_n=1600 cm²/(V.s)>|_{T=0 K}6000 cm²/(V.s)>|_{T=300 K}
* Hole mobility, μ_p=600 cm²/(V.s)>|_{T=0 K}4000 cm²/(V.s)>|_{T=300 K}

Applications

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.

ee also

* Lead selenide
* Tin telluride

References

External links

* [http://www.espimetals.com/msds's/leadtelluride.pdf PbTe] Material Safety data Sheet
* [http://www.npi.gov.au/database/substance-info/profiles/50.html National Pollutant Inventory Lead and compounds fact sheet]
* [http://www.webelements.com/webelements/compounds/text/Pb/Pb1Te1-1314916.html Webelements]