Question: 1. (a) What are the intercept points on the x, y, u and z axes for the shaded planes in the hexagonal crystal structures

1. (a) What are the intercept points on the x, y, u and z axes for the shaded planes in the hexagonal crystal structures (i), (ii), and (iii) shown below? (6 marks) (i) Z (ii) N (iii) N y y y (b) Determine the Miller-Bravais indices for the shaded planes in the hexagonal crystal structures in (i), (ii) and (iii) from part (a) above. (6 marks) (c) State the relationships between lattice parameters and unit cell angles for a 3D unit cell in the hexagonal crystal system. (1 marks) (d) How many whole atoms per primitive unit cell are there in a hexagonal close packed crystal? Explain how you obtained your answer. (3 marks) X

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