Atoms of element \( X \) form hcp lattice and those of element \( Y \) occupy \( \frac{2^{\text ...

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Atoms of element \( X \) form hcp lattice and those of element \( Y \) occupy \( \frac{2^{\text {rd }}}{3} \) of its tetrahedral voids. The percentage of element \( \mathrm{X} \) in the lattice is (Nearest integer)
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