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Which of the following FCC structure contains cations in alternate tetrahedral voids? (A) NaCl (B) ZnS (C) Na2O (D) CaF2

Which of the following FCC structure contains cations in alternate tetrahedral voids? 


 (A) NaCl (B) ZnS 


 (C) Na2O (D) CaF2

Grade:11

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
8 years ago
In CaF2, F- occupy all the tetrahedral hole.
In NaCl structure each Na+ occupy is sorrounded by 6 Cl- and and this suggests an octahedral arrangement
InZnS half of the tetrahedral hole is occuopied and half is leff vacant.Therefore in ZnS has FCC structure in which it occupy alternate tetrahedral hole.

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