InterviewSolution
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InterviewSolution
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Which of following statements is correct in the zinc-blende-type structure of an ionic compound?A. Coordination number of each cation and anion is `2`.B. Coordination number of each cation and union is `4`.C. Coordination number of each cation and union is `6`.D. Coordination number of each cation and union is `8`. |
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Answer» Correct Answer - B `ZnS` has diamond cubic structure in which `S^(2-)` ions from `bcc` lattice and `Zn^(2+)` ions are present in alternalte `TV_(s)`. `Z_(eff)` of `S^(2-) = 4` (corner `+` face centre `= 3 + 4`). `Z_(eff)` of `Zn^(2+) = 4` (Total `TV_(s) = 8`, alternate `TV_(s) = 4`). So `Z_(eff)` of `ZnS = 4` Hence, the formula is `Zn_(4)S_(4)`. So coordination number of `Zn^(2+)` and `S^(2-)` is `4` each. |
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