For a generic Cubic Close Packed (CCP) structure formed by identical constituent atoms, which of the — Solid State Chemistry Question
Question
For a generic Cubic Close Packed (CCP) structure formed by $N$ identical constituent atoms, which of the following statements uniquely describe its interstitial voids?
Answer: A,B,C
💡 Solution & Explanation
In CCP/FCC ($Z=N=4$), there are $2N=8$ tetrahedral voids located on the 4 body diagonals, not on the edges. There are $N=4$ octahedral voids located at the 12 edge centers ($12 \times \frac{1}{4} = 3$) and precisely 1 at the body center.
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