Lead(II) telluride

From Wikipedia, the free encyclopedia

Lead(II) telluride
Image:Lead(II) telluride.jpg
Systematic name	Lead(II) telluride
Other names	Lead telluride
Molecular formula	PbTe
Molar mass	335 g.mol^-1
Density	8160 kg.m^-3
Solubility (water)	x.xx g/l
Melting point	924 °C
Boiling point	xx.x °C
CAS number	[1314-91-6]
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] [1].

1 Properties
2 Applications
3 See also
4 External links

[edit] 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 K6000 cm²/(V.s)>|_T=300 K
Hole mobility, μ_p=600 cm²/(V.s)>|_T=0 K4000 cm²/(V.s)>|_T=300 K

[edit] 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.