Q.What are point defects?

Step 1. No real crystal is perfect; crystal defects are broadly classified into point defects, line defects, interstitial defects and volume defects.

Step 2. A point defect is an irregularity confined to a single lattice point (or a small number of neighbouring points) -- for example, an ion missing from its expected site, an ion sitting in the wrong (interstitial) place, or a foreign impurity ion substituted into the lattice. …

Define point defects as site-level irregularities, then name the three fam …

• Confusing point defects with line/volume defects, which extend along a line or through a region of the crystal rath …