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GATE XE 2026 | Question: 47

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Which one of the following statements regarding point defects in ionic solids is correct?

  1. Frenkel defects are dominant in those ionic solids where there is a considerable size difference between the cation and anion.
  2. Schottky defects are dominant in those ionic solids where there is a considerable size difference between the cation and anion.
  3. Schottky defects are the dominant defects in all ionic solids.
  4. Similar density of both Frenkel and Schottky defects is present in all ionic solids.

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