Question

Explain schottky defect and frenkel defect.

Answer 1

Hey there!!!

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 SCHOTTKY DEFECT : It is due to equal number of cations and anions missing from lattice sites.

This results in the decrease in the density of the crystal.

This type of defect is found in highly ionic compounds with high coordination number and having cations and anions of similar sizes.
Example : NaCl , CsCl etc.

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FRENKEL DEFECT : It is due to the missing of ions ( usually cations) from the lattice sites and these occupy the interstitial sites.

It has no effect on the density of the crystal.

This type of defect is found in crystals with low coordination number and in which the difference in the size of cations and anions is very large.
Example: Silver halides.

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Hope it helps !!!!

Answer 2

I hope it helps you............