Lead telluride

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Lead telluride[1][2]

[3]

Identifiers
CAS number 1314-91-6 YesY
PubChem 4389803
Properties
Molecular formula PbTe
Molar mass 334.80 g/mol
Appearance gray cubic crystals.
Density 8.164 g/cm3
Melting point 924°C
Solubility in water 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
Coordination
geometry
Octahedral (Pb2+)
Octahedral (Te2−)
Thermochemistry
Std molar
entropy
So298
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 are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
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[edit]

Applications[edit]

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[edit]

  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.  edit

External links[edit]