Question

Schottky defect in crystals is observed 

a. when unequal number of cations and anions are missing from the lattice 

b. when equal number of cations and anions are missing from the lattice 

c. when the density of the crystal is increased 

d. when an ion leaves its normal site and occupies an interstitial site.

Answer 1

b. when equal number of cations and anions are missing from the lattice