Examine the given defective crystal {:(X^(+),Y^(-),X^(+),Y^(-),X^(+)),(,X^(+),,, ),(Y^(-),O,Y^(-),X^(+),Y^(-)),(X^(+),Y^(-),X^(+),Y^(-),X^(+)),(Y^(-),X^(+),Y^(-),X^(+),Y^(-)):} Answer the following questions : (i) Is the above defect stoichiometric or non-stoichiometric ? (ii) Write the term used for this type of defect. (iii) Why do silver halides show this type of defect ?

Examine the given defective crystal {:(X^(+),Y^(-),X^(+),Y^(-),X^(+))

1.	Examine the given defective crystal {:(X^(+),Y^(-),X^(+),Y^(-),X^(+)),(,X^(+),,, ),(Y^(-),O,Y^(-),X^(+),Y^(-)),(X^(+),Y^(-),X^(+),Y^(-),X^(+)),(Y^(-),X^(+),Y^(-),X^(+),Y^(-)):} Answer the following questions : (i) Is the above defect stoichiometric or non-stoichiometric ? (ii) Write the term used for this type of defect. (iii) Why do silver halides show this type of defect ?
Answer» SOLUTION :(i) This defect is STOICHIOMETRIC. (ii) FRENKEL defect (iii) `AG^(+)` ion due to its SMALL size fits into the interstitial position.