How does the density of crystal change due to Schottky defects ?

Schottky defect is-

Density of crystal decreases in

Examine the illustration of a portion of the deffective crystal and answer the following question : (a) What are these type of vacancy defects called ? (b) How is the density of a crystal affected by these defects ? (c) Name one ionic compound which can show this type of defect in the crystalline state. (d) How is the stoichiometry of the compound affected ?

Write the cell reaction of a lead storage battery when it is discharged. How does the density of the electrolyte change when the battery is discharged?

An ionic crystal with Schottky defects has-

Explain Schottky defect.

The metal calcium crystallizes in a face centred cubic unit cell with a = 0.556 nm. Calculate the density of the metal if it contains 0.1% Schottky defects

How does the velocity of Brownian particles change due to movement of the vessel?

The metal calcium crystallises in fcc unit cell with a = 600 pm. Calculate the density of the metal if it contains 0.2% Schottky defects.

Schottky defect lowers the density of ionic crystals while Frenkel defect does not. Discuss.