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Stress-Strain Graph

if in frenkel...

Question

if in frenkel defect, cations occupy the interstitial sites, then how will stability of the solid be maintained? wouldn't the cations repel each other?

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Cations are present in the interstitial sites in ...........

(a) Frenkel defect (b) Schottky defect

(c) vacancy defect (d) metal deficiency defect

Assertion: Frenkel defect doesn’t have any effect on density of the crystal.

Reason: Dislocated cation occupies the interstitial site

How Metal excess defect is caused by the presence of extra cations in the interstitial sites?

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 :

Q. Which type of defect has the presence of cations in interstitial sites?

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