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

Explain the following : (i) How does density of crystals change due to Schottky defect ? (ii) How is conductivity of covalenet solids increased by introducing impurities ?

The density of a crystal ....... due to Schottky defect.

Due to Frenkel defect, the density of the crystal, …….. Wherease due to schottky defect, it ……

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. Name the defect.

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

How Schottky and Frenkel defects occur in ionic crystals? How does the density of a crystal gets affected by the presence of these defects ?

Due to Frenkel defect, the density of the ionic solids ……… while due to Schottky defects, density ………. .

Due to schottky defect the density of the crystal A… whereas due to frenkel defect it B…, here , A and B refers to