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In which among the following case there is only one plane that can form a coherent interface?

In which among the following case there is only one plane that can form a coherent interface? Correct Answer HCP

Only a single plane can form a coherent interface in case of a HCP/FCC interface, no other plane is identical in both crystal lattices. However all the lattice planes are identical apart from the differences in the composition if the two adjoining phases have the same crystal structure and lattice parameter.

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