Lead telluride facts for kids

Kids Encyclopedia Facts
Lead telluride
Other names Lead(II) telluride
Altaite
Identifiers
CAS number 1314-91-6
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, 1197 K, 1695 °F

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 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
MSDS External MSDS
EU classification Repr. Cat. 1/3
Harmful (Xn)
Dangerous for the environment (N)
EU Index 082-001-00-6
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, 100 kPa)

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

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

Preparation

It may be made by melting lead and tellurium together.

Uses

It is used as a semiconductor and an infrared detector.

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