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AgI crystallises in the cubic close-pack...

AgI crystallises in the cubic close-packed zinc blend structure. Assuming that the iodide ions occupy the lattice points, fraction of the tetrahedral sites occupies by sliver ions are 

A

`50%`

B

`75%`

C

`100%`

D

`33.3%`

Text Solution

Verified by Experts

The correct Answer is:
A
No. of iodide ions = 4. If all the tetrahedral voids are occupied by silver ions then no. of silver ions = 8. But according to formula there must be four silver ions. `therefore` Half of the TV are ocupied i.e. 50%
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AAKASH SERIES-SOLID STATE-PRACTICE SHEET - 2
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