(i) The above defect is stoichiometric because the no. of missing cation and anion is equal. (a cation is missing from 2nd row and an anion is missing from 3rd row)
(ii) This defect is called Schottky defect. It is a vacancy defect shown by anionic substances in which cation and anion are of similar size.
An example of the compound which shows this type of defect is NaCl.
(iii) Since, the cations and anions are missing from the lattice thereby creating vacancy. Thus, density of crystal decreases.
Rate this question :