The closest packing sequence ABABAB..... represents
A
primitive cubic packing
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B
body- centred cubic packing
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C
face-centred cubic packing
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D
hexagonal closed packing
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Solution
The correct option is D hexagonal closed packing When the pattern of spheres is repeated in alternate layers, this pattern is often written as ABABAB....... pattern. This structure is called hexagonal close packed (hcp) structure.