MCQ
An element exists as hexagonal close packed structure as well as cubic closed packed structure. In which case the element would have higher density?
- A$\text{CCP}$
- B$\text{HCP}$
- ✓Same in both
- DUnpredictable
✓
Answer
Correct option: C.
Same in both
The packing efficiencies of both hcp and $\text{ccp}$ is approximately same that is $74\%$ density of the element will be same in both the cases as two structures will have the same coordination number and hence, the same packing fraction and density.
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