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In a binary compound,


In a binary compound, atoms of element $\mathrm{A}$ form a hcp structure and those of element $\mathrm{M}$ occupy $2 / 3$ of the tetrahedral voids of the hcp structure. The formula of the binary compound is :

  1. $\mathrm{M}_{2} \mathrm{~A}_{3}$

  2. $\mathrm{M}_{4} \mathrm{~A}_{3}$

  3. $\mathrm{M}_{4} \mathrm{~A}$

  4. $\mathrm{MA}_{3}$

Correct Option: , 2


$\mathbf{M}_{12 \times \frac{2}{3}} \mathrm{~A}_{6}$

$\mathrm{M}_{8} \mathrm{~A}_{6}$

$\mathrm{M}_{4} \mathrm{~A}_{3}$

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