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What is Frenkel defect?How does it affec...

What is Frenkel defect?How does it affect density of solid?

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The defect in which an ion (generally cation) leaves the original site and occupies the interstitial site is called frenkel defect.
`Density=(ZM)/(a^(3)N_(a))=(2xx23xx10^(-3))/(420xx10^(-12)xx6.022xx10^(23))=3.73kgm^(-3)`
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