| Section2 = }} Lead sulfide (also spelled sulphide, see Sulfur#Spelling) is a chemical compound, most often purified from the mineral galena. PbS, PbSe and PbTe lead salts are semiconductors of the IV-VI family. Lead sulfide is toxic due to the lead content, see lead poisoning. Applications Lead sulfide and several other lead compounds are used as detection element material in various infra-red sensors. Of these, PbS (lead sulfide) is one of the oldest and most commonly used. It is used for eg… (More on Pbs)