Lead telluride[1][2] | |
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Other names
Lead(II) telluride |
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Identifiers | |
CAS number | 1314-91-6 |
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 enthalpy of formation ΔfH |
-70.7 kJ·mol-1 |
Std enthalpy of combustion ΔcH |
110.0 J·mol-1·K-1 |
Standard molar entropy S |
50.5 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 |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Lead telluride is a compound of lead and tellurium (PbTe); it is a narrow gap semiconductor. It occurs naturally as the mineral altaite.
Contents |
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.
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