abstract:Playfairite is a very rare sulfosalt mineral with chemical formula Pb16Sb18S43 in the monoclinic crystal system,Mindat information page for Playfairite Webmineral information page for Playfairite named after the Scottish scientist and mathematician John Playfair.Handbook of Mineralogy information page for Playfairite It was discovered in 1966 by the Canadian mineralogist John Leslie Jambor.