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Impurity defect is a type of point defect. It can occur __________

Impurity defect is a type of point defect. It can occur __________ Correct Answer in two ways, as substitution impurity defect or as interstitial impurity defect

An impurity defect occurs when a regular ion is replaced by some other type of ion, e.g. Na+ is replaced by K+. If the replacement occurs in the place of the regular cation, it is called a substitution impurity defect. If the replacement occurs in an interstitial position, it is called an interstitial impurity defect.

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