Which of the following defects,if present,low | vedclass

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(D) In a $Schottky$ defect,an equal number of cations and anions are missing from their lattice sites. Since the number of ions decreases while the vo

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Schottky defect

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(D) In a $Schottky$ defect,an equal number of cations and anions are missing from their lattice sites. Since the number of ions decreases while the volume of the crystal remains the same,the overall mass of the crystal decreases. Consequently,the density of the crystal decreases. In contrast,$Frenkel$ defects do not change the density because ions merely shift to interstitial sites. $Interstitial$ defects increase density by adding extra atoms to interstitial spaces.

Which of the following defects,if present,lowers the density of a crystal?

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