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Sketch the [11-20] direction within the (0001) plane relative to an hcp unit cell. Include all...

Sketch the [11-20] direction within the (0001) plane relative to an hcp unit cell. Include all atom-center positions within the plane of interest.

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Answer #1

By choosing 4 axis named a1, a2, a3, z I have drawn the plane and also the direction on the same plane. Just for clarity I have drawn two pictures. The [110] direction in 3 indexing system will convert into [11-20] direction in 4 indexing system of HCP

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