Question:
What is Schottky defect? What is the effect of the presence of Schottky defect on the density of lattice?
What is Schottky defect? What is the effect of the presence of Schottky defect on the density of lattice?
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Schottky defect is common in highly ionic crystals like NaCl, KCl, CsCl, and AgBr.
Updated On: Oct 7, 2025
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Solution and Explanation
Step 1: Definition.
Schottky defect is a type of point defect in ionic crystals where equal number of cations and anions are missing from their lattice sites, maintaining electrical neutrality. Step 2: Effect on density.
Since some ions are missing from the lattice, the mass of the unit cell decreases but the volume remains the same. Hence, the density of the lattice decreases. Conclusion:
Schottky defect lowers the density of the crystal without disturbing its electrical neutrality.
Schottky defect is a type of point defect in ionic crystals where equal number of cations and anions are missing from their lattice sites, maintaining electrical neutrality. Step 2: Effect on density.
Since some ions are missing from the lattice, the mass of the unit cell decreases but the volume remains the same. Hence, the density of the lattice decreases. Conclusion:
Schottky defect lowers the density of the crystal without disturbing its electrical neutrality.
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