Chemical Etches and Etch Pit Patterns on PbS Crystals

Abstract
Chemical etches have been found which polish or remove thick surface layers from PbS crystals. One of these etches results in the formation of etch pits. The dissolving action of this etch on PbS, PbSe, and PbTe and the etch pit patterns formed by it on natural and synthetic PbS crystals are discussed.