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If Z is the number of atoms in the unit ...

If `Z` is the number of atoms in the unit cell that represent the closed packing sequence `---ABCAB---` the number of terrahedral in the unit cell is equal to

A

`Z`

B

`2Z`

C

`Z//2`

D

`Z//4`

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The correct Answer is:
2
In a closet packed structure (such as ccp or hcp) if there are `Z` sphere (atoms and irons),there are `2Z` tetrahedral voids and `Z` octahedral voids.
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