Why does Schottky defect decrease the desity of a crystal ?

In an ionic crystal, Schottky defect decreases the density of the crystal but Frenkel defect does not cause any change in density of the crystal. Explain.

Frenkel defect does not change the density of the ionic crystal whereas, Schottky defect lowers the density of ionic crystal. Give a reason.

What is the effect of the presence of Schottky defects on the density of a crystal?

What is the effect of Schottky defect on the density of crystal ?

What is the effect of Schottky defect on the density of crystal ?

What is the effect of the presence of schottky defect on the density of a crystal?

What is the effect of Schottky defect on the density of crystal ?

What is the effect of presence of Schottky defects on the density of the crystal?

Schottky defect does not causes