Chemistry - Solid State Question with Solution | TestHub

In a Schottky defect, an equal number of cations and anions are missing from their regular lattice sites to maintain electrical neutrality.

Due to the missing ions, the mass of the crystal decreases while the volume remains the same, leading to a decrease in the density of the crystal.

The defect where an ion leaves its normal site and occupies an interstitial site is known as a Frenkel defect.

Answer: Equal number of cations and anions are missing from their regular positions in the crystal lattice.