Examine the given defective crystal {:(X^+, Y^-, X^+, Y^-, X^+),(Y^+, Z^(2+), Y^- , X^+, Y^-),(X+ , Y^- , O, Y^- , X^+),(Y^-, X^+, Y^- , X^+, Y^-):} (i)Write the term used for this type of defect (ii)What is the result when XY crystal is doped with divalent (Z^(2+)) impurity?

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

1.	Examine the given defective crystal {:(X^+, Y^-, X^+, Y^-, X^+),(Y^+, Z^(2+), Y^- , X^+, Y^-),(X+ , Y^- , O, Y^- , X^+),(Y^-, X^+, Y^- , X^+, Y^-):} (i)Write the term used for this type of defect (ii)What is the result when XY crystal is doped with divalent (Z^(2+)) impurity?
Answer» Solution :(i)The TERM used is 'doping' . It means adding impurity of `Z^(2+)` into the CRYSTAL of `X^+ Y^-` . (II)The result is creation of cation VACANCIES (as TWO `X^+` cations are replaced by one `Z^(2+)` cation). These vacancies result in higher electrical conductivity.