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AgI crystallises in a cubic close-packed...

AgI crystallises in a cubic close-packed ZnS structure. What fraction of tetrahedral sites is occupied by `Ag^(+)` ions ?

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To determine the fraction of tetrahedral sites occupied by Ag⁺ ions in the cubic close-packed structure of AgI, we can follow these steps: ### Step 1: Understand the Structure AgI crystallizes in a structure similar to ZnS. In the ZnS structure, the S²⁻ ions occupy the cubic close-packed (CCP) positions, while the Zn²⁺ ions occupy half of the tetrahedral voids. ### Step 2: Identify the Iodine Position In AgI, the I⁻ ions will occupy the same positions as the S²⁻ ions in the ZnS structure. Therefore, the I⁻ ions will also form a cubic close-packed structure. ...
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