The defects in crystalline solids are of two types viz.,
(1) Point defect and
(2) Line defect.
(1) Point defects are further classified as :
(a) Vacancy defect or Schottky defect
(b) Interstitial defect or Frenkel defect
(c) Impurity defect
This is further classified as :
- Substitution impurity defect
- Interstitial impurity defect.
(2) Line defects are further classified as :
- Edge dislocation
- Screw dislocation.
