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What is the difference between Schottky defect and Frenkel defect?

A Schottky defect is a pair of missing cation+anion (lowers density); a Frenkel defect is an ion displaced to an interstitial site (density unchanged) — seen in ionic solids.

A Schottky defect is a pair of missing cation+anion (lowers density); a Frenkel defect is an ion displaced to an interstitial site (density unchanged) — seen in ionic solids. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.

Key point

Schottky defect vs Frenkel defect

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