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InterviewSolution
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2.Define point defect. Why is Frenkel defect produced in solid crystal? |
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Answer» Point defects are where an atom is missing or is in an irregular place in the lattice structure. Point defects include self interstitial atoms, interstitial impurity atoms, substitutional atoms and vacancies. An example of interstitial impurity atoms is the carbon atoms that are added to iron to make steel. AFrenkel defectorFrenkeldisorder is a type ofpoint defectin acrystal lattice. Thedefectforms when an atom or smaller ion (usually cation) leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location |
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