In a highly ionic crystal of at standard room temperature, the approximate number of Schottky defect — Solid State Chemistry Question

💡 Solution & Explanation

According to standard crystallographic measurements for highly ionic solids like $NaCl$, there are approximately $10^6$ Schottky pairs per $cm^3$ at standard room temperature. While small relative to the total number of ions ($\approx 10^{22}$), these macroscopic defects are enough to initiate measurable ionic conductivity.