Question

Give the classification of stoichiometric point defects. What is a substitutional impurity defect? Explain solid
solutions of metals and vacancy through aliovalent cations.​

Answer 1

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Answer 2

Explanation:

Substitutional impurity defect is found in element having crystal based structure. In this kind of impurity,  the atom is often incorporated at a regular atomic site in the crystal structure. This means that the atom does not own a required place in the structure but it fits inside forcefully leading to a substitutional defect. Since the atom is not supposed to be in the crystal, so it is called an impurity.