Which of the following defect, if present, lowers the density of the crystal? — Solid State Chemistry Question

💡 Solution & Explanation

In a Schottky defect, equal numbers of cations and anions are missing from their normal lattice sites, leading to a decrease in the mass of the crystal while the volume remains unchanged, thus lowering the density. Frenkel and interstitial defects do not change density. Therefore, correct answer is B.