Impurity Insights Defects in Strontium chloride

The video tutorial explains defects in ionic crystals, focusing on metal cation defects, metal deficiency defects, and impurity defects. It describes how unipositive metal cations create vacancies, leading to electrical imbalance, and how dipositive ions replace them to maintain neutrality. Transition metals with variable valences exhibit metal deficiency defects, as seen in ferrous oxide. Impurity defects occur when foreign ions replace parent ions, affecting electrical conductivity. The tutorial uses examples like sodium chloride and strontium ions to illustrate these concepts.

What is an impurity defect and how does it occur in ionic solids?

Describe the effect of cation vacancy on the electrical conductivity of a crystal.