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...Crystal imperfections why should we study technically important properties such as mechanical strength ductility growth magnetic hysteresis dielectric conduction in semiconductors are greatly affected by relatively minor changes structure caused defects the regular geometrical arrangement of atoms a crystalline solid perfect is an idealization there no thing nature may be results deformation or rapid cooling from high temperature energy radiation striking influence electrical and optical behavior theimperfectionsmaybeclassifiedwidelyas point line surface volumedefects...