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Lead(II) sulfide

Lead(II) sulfide
Galena-unit-cell-3D-ionic.png
Sulfid olovnatý.PNG
Names
Other names
Plumbous sulfide
Galena, Sulphuret of lead
Identifiers
1314-87-0 YesY
3D model (Jmol) Interactive image
ChemSpider 14135 N
ECHA InfoCard 100.013.861
Properties
PbS
Molar mass 239.30 g/mol
Density 7.60 g/cm3
Melting point 1,118 °C (2,044 °F; 1,391 K)
Boiling point 1,281 °C (2,338 °F; 1,554 K)
2.6×10−11 kg/kg (calculated, at pH=7) 8.6×10−7 kg/kg
9.04×10−29
−84.0·10−6 cm3/mol
3.91
Structure
Halite (cubic), cF8
Fm3m, No. 225
a = 5.936 Angstroms
Octahedral (Pb2+)
Octahedral (S2−)
Thermochemistry
46.02 J/degree mol
91.3 J/mol
–98.7 kJ/mol
Hazards
Safety data sheet External MSDS
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
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point Non-flammable
Related compounds
Other anions
Lead(II) oxide
Lead selenide
Lead telluride
Other cations
Carbon monosulfide
Silicon monosulfide
Germanium(II) sulfide
Tin(II) sulfide
Related compounds
 Thallium sulfide
Lead(IV) sulfide
Bismuth sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YesYN ?)
Infobox references

Lead(II) sulfide (also spelled sulphide) is an inorganic compound with the formula PbS. PbS, also known as galena, is the principal ore, and most important compound of lead. It is a semiconducting material with niche uses.

Addition of hydrogen sulfide or sulfide salts to a solution of lead ions gives PbS as an insoluble black precipitate.

The equilibrium constant for this reaction is 3×106 M. This reaction, which entails a dramatic color change from colourless or white to black, was once used in qualitative inorganic analysis. The presence of hydrogen sulfide or sulfide ions is still routinely tested using "lead acetate paper."

Like the related materials PbSe and PbTe, PbS is a semiconductor. In fact, lead sulfide was one of the earliest materials to be used as a semiconductor. Lead sulfide crystallizes in the sodium chloride motif, unlike many other IV-VI semiconductors.

Since PbS is the main ore of lead, much effort has focused on its conversion. A major process involves smelting of PbS followed by reduction of the resulting oxide. Idealized equations for these two steps are:

The sulfur dioxide is converted to sulfuric acid.

Lead sulfide-containing nanoparticle and quantum dots have been well studied. Traditionally, such materials are produced by combining lead salts with a variety of sulfide sources. PbS nanoparticles have been recent examined for use in solar cells.


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