Solid State Chemistry Chapter 5 Crystal Defects, Non-Stoichiometry and Solid Solution

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Solid State ChemistryChapter 5Crystal Defects,
Non-Stoichiometry and Solid Solution

• Hong-Wen Wang

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5.1 Perfect and Imperfect crystals

• Crystals are invariably imperfect because defects
  leads to a reduction of free energy.
• Creation of defects increase enthalpy and
  entropy. According to

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5.2 Types of Defect point defects

• Schottky defect cation vacancy and anion
  vacancy.
• Frenkel defect Cation vacancy and cation
  interstitial

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