Final answer:
Crystal defects are deviations from the regular pattern in a crystalline solid. They can be classified into point defects and line defects. To avoid defects, manufacturing processes should be carefully controlled and strict purity standards need to be maintained for materials.
Step-by-step explanation:
Crystal defects are deviations from the regular pattern in a crystalline solid. They can be classified into point defects and line defects. Point defects include vacancies, interstitial atoms, and substitution impurities. Line defects include dislocations.
To avoid defects, manufacturing processes should be carefully controlled. For example, in the case of metal impurities in crystals, strict purity standards need to be maintained. Additionally, careful handling, storage, and processing of materials can help prevent defects.
Keywords: crystal defects, point defects, line defects, vacancies, interstitial atoms, substitution impurities, manufacturing processes