Aug 23 2013
Topics Covered
Description
Applications
Chemical Properties
Electrical Properties
Thermal, Mechanical and Optical Properties
Safety Information
Description
Lead sulfide is an inorganic compound with the chemical formula PbS. It is also known as galena, which is the principal ore and important compound of lead. It is one of the earliest materials to be used as a semiconductor as it tends to crystallize in sodium chloride. Lead sulfide is toxic if it is heated to decomposition, which forms lead and sulfur oxides.
Applications
Lead sulfide finds applications in the following:
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Infrared detectors
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Photo optic applications
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Slip property modifier used in friction industry for enhancing heat conduction and regulating friction coefficient.
Chemical Properties
The chemical properties of lead sulfide are provided in the table below:
Chemical Properties |
Chemical Formula |
PbS |
Molecular Weight |
239.30 |
CAS No. |
1314-87-0 |
Group |
Lead - 14
Sulfur - 16 |
Crystal Structure |
Cubic |
Symmetry Group |
Fm3m |
Lattice Constant |
5.936 Å |
Electrical Properties
The electrical properties of lead sulfide are provided in the table below:
Electrical Properties |
Magnetic Susceptibility |
-0.0000836 |
Band Gap |
0.37 eV |
Electron Mobility |
600 cm2/Vs |
Hole Mobility |
600 cm2/Vs |
Thermal, Mechanical and Optical Properties
The thermal, mechanical and optical properties of lead sulfide are provided in the tables below:
Thermal Properties |
Heat of Fusion |
72 J/g |
Heat of Formation |
435 kJ/mol |
Thermal Conductivity |
2.30 W/mK |
Mechanical Properties |
Density |
7.61 g/cm3 |
Melting Point |
1117°C |
Mohs Hardness |
2.5 |
Optical Properties |
Refractive Index |
3.91 |
Safety Information
Safety Information |
GHS Hazard Statements |
H302 - Harmful if swallowed
H332 - Harmful if inhaled
H360Df - May damage the unborn child. Suspected of damaging fertility
H373 - May cause damage to organs through prolonged or repeated exposure
H410 - Very toxic to aquatic life with long lasting effects. |
Safety Precautions |
P201 - Obtain special instructions before use
P273 - Avoid release to the environment
P308 + P313 - IF exposed or concerned: Get medical advice/ attention
P501 - Dispose of contents/ container to an approved waste disposal plant. |