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Which of the following quantities is larger in HCP as compared to FCC if the constituting atoms are similar?

Which of the following quantities is larger in HCP as compared to FCC if the constituting atoms are similar? Correct Answer

An HCP unit cell contains 6 atoms rather than only 4 present in FCC. Also, both structures are assumed to be comprised of similar atoms thus HCP being heavier. However, the HCP unit cell is also larger in volume than an FCC one such that both have same packing efficiency.

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