Lead sulfide

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lead sulfide
Chemical formula PbS
OTP appearance black solid 
Molar Mass(g/mol) 239.3 
Melting Point(°C) 1118 
Boiling Point(°C) 1281 
Density(g/cc) 7.60
NFPA 704
NFPA704.png
0
2
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Uses

Primary

  • Source of lead by smelting

Secondary

  • Semiconductor
    • Natural detector
    • Natural LED
  • Side product in acetic anhydride manufacture

Natural occurrence

Hazards

Character

Dominant species of PbS•PbSO4•PbO in an oxidizing environment at various temperatures[1]
Temp (°C) Species
<260 PbS
300 PbSO4
600 4PbSO4•PbO
800 PbSO4•2PbO
900 PbSO4•4PbO
1000 PbSO4•4PbO

Oxidation

More at Galena under smelting

Lead sulfide, when heated in an oxidizing environment, becomes lead sulfate. Lead sulfate, when heated, gives off sulfur dioxide, which may be useful in making sulfuric acid. The remaining lead (II) oxide may be carbothermically reduced to form elemental lead.

Production

Purification

Testing

Storage

Disposal

See Also

References

  1. Abdel-Rehim, A. M. (2006) "Thermal and XRD analysis of Egyptian galena".
    Journal of Thermal Analysis and Calorimetry 86(2)