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ch05 - Chapter 5 Imperfections in Solids Concept Check 5.1...

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Chapter 5 Imperfections in Solids Concept Check 5.1 Question: Can Schottky defects exist in K 2 O? If so, briefly describe this type of defect. If they cannot exist, then explain why.. Answer: This question can be answered in two ways, as follows: (1) Yes, Schottky defects can exist in K 2 O; each defect will consist of one O 2- vacancy and two K + vacancies. (2) No, in the strict sense, Schottky cannot exist in K 2 O if we consider this type of defect to consist of a cation-anion pair; for every O 2- vacancy created there must exist two K + vacancies.
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