Question:
Stacking sequence of FCC is
Stacking sequence of FCC is
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ABC = FCC (3 letters, 3 layers); AB = HCP (2 letters, 2 layers).
Updated On: Jul 4, 2026
- ABABABABA...
- ACBCCBACC...
- ABCABCABC...
- CBACBACBB...
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Close-packed structures are formed by stacking layers of spheres to minimize void space.
Step 2: Meaning
There are two primary ways to stack the third layer relative to the first two.
Step 3: Analysis
Hexagonal Close-Packed (HCP) follows an ABAB sequence where the third layer is directly above the first. FCC follows an ABCABC sequence where the third layer is offset.
Step 4: Conclusion
The unique stacking sequence for the FCC structure is ABCABC.... Final Answer: (C)
Close-packed structures are formed by stacking layers of spheres to minimize void space.
Step 2: Meaning
There are two primary ways to stack the third layer relative to the first two.
Step 3: Analysis
Hexagonal Close-Packed (HCP) follows an ABAB sequence where the third layer is directly above the first. FCC follows an ABCABC sequence where the third layer is offset.
Step 4: Conclusion
The unique stacking sequence for the FCC structure is ABCABC.... Final Answer: (C)
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