Examine the illustration of a portion of the defective crystal given below and answer the following questions : (i) What are these type of vacancy defects called ? (ii) How is the density of a crystal affected by these defects ? (iii) Name one ionic compound which can show this type of defect in the crystalline state. (iv) How is the stoichiometry of the compound affected ?

Examine the illustration of a portion of the defective crystal given b

1.	Examine the illustration of a portion of the defective crystal given below and answer the following questions : (i) What are these type of vacancy defects called ? (ii) How is the density of a crystal affected by these defects ? (iii) Name one ionic compound which can show this type of defect in the crystalline state. (iv) How is the stoichiometry of the compound affected ?
Answer» Solution :(i) SCHOTTKY DEFECT. (II) DENSITY of the crystal decreases. (iii) NACL (iv) Stoichiometry is not affected.