Defect chemistry is definitely the review of stage defects in imperfect crystals. These consist of vacancies, interstitial atoms or ions, trace factors, electrons, or holes or every other deviation from the framework of a perfect crystal. Even absolutely pure crystals contain issue defects at any temperature earlier mentioned absolute zero. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share