Lead telluride

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Lead telluride[1][2][3]
Names
Other names
Lead(II) telluride
Altaite
Identifiers
ECHA InfoCard 100.013.862
PubChem {{{value}}}
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
Halite (cubic), cF8
Fm3m, No. 225
a = 6.46 Angstroms
Octahedral (Pb2+)
Octahedral (Te2−)
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-70.7 kJ·mol−1
Std enthalpy of
combustion
ΔcHo298
110.0 J·mol−1·K−1
Standard molar
entropy
So298
50.5 J·mol−1·K−1
Hazards
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
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

Lead telluride, also known as lead(II) telluride, is a chemical compound. Its chemical formula is PbTe. It contains lead and telluride ions. The lead is in the +2 oxidation state.

Properties[change | change source]

Lead telluride is a gray crystalline solid. It reacts with strong acids to make toxic hydrogen telluride and toxic lead salts.

Preparation[change | change source]

It may be made by melting lead and tellurium together.

Uses[change | change source]

It is used as a semiconductor and an infrared detector.

Related pages[change | change source]

References[change | change source]

  1. Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, Florida: CRC Press, pp. 4–65, ISBN 978-0-8493-0594-8
  2. CRC Handbook, pp. 5–24.
  3. Lawson, William D (1951). "A method of growing single crystals of lead telluride and selenide". J. Appl. Phys. 22 (12): 1444–1447. doi:10.1063/1.1699890.