26% void space in its crystal structure is observed for A) FCC structure B) HCP structure C) CCP structure.

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A only

All A, B, C

B only

C only

answer is D.

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Detailed Solution

Common sphere packings taken on by atomic systems are listed below with their corresponding packing fraction.
Simple cubic: 0.52 or 52%
Body-centered cubic (bcc): 0.68 or 68 %
Hexagonal close-packed (hcp): 0.74 or 74%
Now the percentage of void space = 100 - Packing percentage
For simple cubic = 100 - 52 = 48 %
For body centred cubic = 100 - 68 = 32 %
For Hexagonal close packed = 100 - 74 = 26 %.

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