A compound is formed by two elements P and Q. Atoms of Q make HCP lattice and those of the element P occupy all the tetrahedral voids. What is the formula of the compound?

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Solution

Once we draw the structure of HCP lattice and consider all the possible tetrahedral voids:
Tetrahedral voids in closed structure = 2 $\times$ No. of Q atoms
and thus this possible formula will be P2Q considering an absence of any structural defects.

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A compound is formed by two elements P and Q. Atoms of Q make HCP lattice and those of the element P occupy all the tetrahedral voids. What is the formula of the compound?

Once we draw the structure of HCP lattice and consider all the possible tetrahedral voids: Tetrahedral voids in closed structure = 2 × No. of Q atoms and thus this possible formula will be P2Q considering an absence of any structural defects.

Once we draw the structure of HCP lattice and consider all the possible tetrahedral voids:
Tetrahedral voids in closed structure = 2 $\times$ No. of Q atoms
and thus this possible formula will be P2Q considering an absence of any structural defects.