DescriptionCubic Closest Packing (CCP) and Hexagonal Closet Packing (HCP).png
English: The first and second layers hace the same arrangement in both CCP and HCP. However, there are two different positions that you can put atoms on the third layer. If the atoms on the third layers are sitting directly above the first layer, then it will form HCP structure If the atoms on the third layers are not sitting exactly the same position as the first layer, then it will form CCP structure.
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