Imperfections in Solids
- Constituent particles in crystalline solids are arranged in a short range as well as long range
order yet crystals are not perfect. - They possess small crystals have defects that are irregularities in the arrangement of constituent
particles in them when crystallization process occurs at fast or moderate rate. - These defects are of two types- point defects and line defects.
- The irregularities or deviations from ideal arrangement around a point or an atom in a
crystalline substance. - The irregularities or deviations from ideal arrangement in entire rows of lattice points are known as line defects.
- These irregularities are called crystal defects.
- Point defects can be classified into three types: (i) stoichiometric defects
(ii) impurity defects and (iii) non-stoichiometric defects
