Type of Stoichiometric defects:
Vacancy defects:
(i) some of the lattice sites of the crystal are vacant.
(ii) This defect decreases the density of the crystal.
(iii) This defect can be developed by heating the substance.
Interstitial defects:
(i) some constituent particles occupy the interstitial sites of the crystal.
(ii) This defect increases the density of the crystal.
