Question

What type of stoichiometric defect in crystals increases the density of a solid?

Answer 1

Interstitial defect raises the density of crystal.
Schottkydefect in crystals increases the density of a solid because the ratio between the anion and cation remain same as respected by the molecular formula.

Answer 2

$ASSALAMUALAIKUM$


In case of an interstitial defect some atoms occupy those spaces in the crystal structure where atoms wouldn't usually be present. So, as there is an increase in the total number of atoms for the same volume., and hence an increase in the density.

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