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What is the non-stoichiometry defect in ...

What is the non-stoichiometry defect in the crystals ?

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### Step-by-Step Solution: 1. **Definition of Non-Stoichiometry Defect**: Non-stoichiometry defects in crystals refer to situations where the ratio of positive ions (cations) to negative ions (anions) in a compound deviates from the ideal stoichiometric ratio as dictated by its chemical formula. This means that the actual composition of the crystal does not match the expected formula. 2. **Understanding Ideal Chemical Formula**: For example, in sodium chloride (NaCl), the ideal stoichiometric ratio is 1:1, meaning one sodium ion (Na⁺) pairs with one chloride ion (Cl⁻). In a perfect crystal, you would expect to find equal numbers of Na⁺ and Cl⁻ ions. ...
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