The dynamic symmetry and plastic deformation of diamond lattice

An analysis of possible transformations of moments of force by a diamond lattice has been made. The conditions of resonance transformations of moments of force by this lattice have been found. The dynamics symmetry of the diamond lattice has been determined in terms of the Shubnikov group Fd3m'. Besides, it has been found that resonance librationally deformed configurations are oneperiodic and have cores 〈110〉 two times more deformed than the surrounding area. As a result of the action of resonance phonons of the librational mode it is possible to generate a new kind of defects-bidislocations with Burgers vector components+110]/2 and −110]/2. It has been shown that bidislocations can play an essential role in plastic deformation of a diamond lattice and other related lattices.