2) A solid is made of P and Q atoms. Atoms Q occupy all tetrahedral sites, what is the formula of the solid?
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Answer:
Effective number of Q⇒Z
Q
=6 (In HCP arrangement)
Effective number of P⇒Z
P
=12 (No. of tetrahedral sites in HCP is 12)
Formula =P
12 Q6 =P 2 Q
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