Frenkel defect
crystallography
Quick Summary
A Frenkel defect is a type of crystal defect where an ion is displaced from its normal lattice position to an interstitial site within the crystal structure. This creates a vacancy where the ion was originally located and an interstitial where it moved to. Unlike a Schottky defect, where ions leave the lattice entirely, a Frenkel defect involves an ion remaining within the crystal but in an irregular position. These defects can influence a crystal's mechanical, electrical, and optical properties.12
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