Defect chemistry would be the review of place defects in imperfect crystals. These involve vacancies, interstitial atoms or ions, trace components, electrons, or holes or almost every other deviation from the structure of a wonderful crystal. Even Totally pure crystals comprise place defects at any temperature earlier mentioned absolute zero. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share