Ionic solids,with Schottky defects,contain in their structure

In $Schottky$ defect,.....

When $CaCl_2$ is added to $AgCl$ crystal,the defect introduced is

Which type of defect is observed in crystals like $NaCl$ and $KCl$?

At what temperature will the Schottky defect be maximum?

$A$ metallic solid undergoes Frenkel defect. Its original mass,volume and density are $M_0$,$V_0$ and $D_0$ respectively. After Frenkel defect the mass,volume and density are $M$,$V$ and $D$ respectively. The variations of $M$,$V$ and $D$ after Frenkel defect are