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in frenkel defect why is a cation usually dislocated from its normal site to an interstitial site

Point Defects-

Frenkel Defect

Frenkel defect is a stoichiometric defect involves an atom displaced off its lattice site into an interstitial site that is normally empty.

• Some covalent interaction between interstitial Ag+ and Cl-, which stabilize the defect
• The vacancy and interstitial are oppositely charged and may attract each other to form a pair (electrically neutral)

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