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Impurity Defect

The incorrect...

Question

The incorrect statement in the following is

A

the density is less than pure crystal in Frenkel defect

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B

Stoichiometry is maintained in Schottky defect

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C

electrical neutrality is maintained in all types of defects

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D

all the above

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Solution

The correct option is A
the density is less than pure crystal in Frenkel defect

Due to missing from crystal of both cations & and anion leaving vacant places

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Q. Explain how electrical neutrality is maintained in compounds showing Frenkel and Schottky defect.

Ionic lattice has two major points defects, (1) Schottky (2) Frenkel defects. Schottky defects occur due to the cation-anion pair's missing from the lattice sites. Frenkel defects occur when an ion leaves its lattice site and fits into interstitial space. The neutrality of the crystal is being maintained and we considered all losses from interstitial positions.

The structure is shown here represents :

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