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Stacking sequence in hexagonal close packed (HCP) structure is?

The stacking sequence in a hexagonal close-packed (HCP) structure is ABABAB.

Detailed Explanation:

  • A hexagonal arrangement of atoms is produced in two dimensions.
  • The close-packed planes are easy to find in the HCP unit cell; they are the (001) and (002) planes of the HCP structure and are given the special name basal planes.
  • In fact, we can build up an HCP unit cell by stacking together close-packed planes in an... ABABAB. . . stacking sequence.