Shape of thermal etch pits and crystal structure in tellurium crystals

During the systematic study of thermal etching of tellurium crystals, various shaped thermal etch pits were observed on the {101 0} cleavage faces of this crystal. An attempt has been made to explain the shape of non-dislocation and dislocation etch pits. A simple model based on crystal structure and bonding of atoms has been suggested to explain the shape of etch pits.