1. Enter the symbol of the zone axis for the planes (3 -2 -1 )and ( -2 1 1).
2. The crystal wall belongs to two zones simultaneously (-1 01)and (-1 2 0). Give its Miller’s indicators.
3. If planes (412), (211) and (201) belong to a common zone,mark the axis symbol of this zone.
4. The lattice parameter of a regular crystal cell AgBr is ?0=5,7745 ? . Calculate the interplanar distance dhkl for the latticeplane family : (200), (220), (311).
5. Calculate the interplanar distance d101 in the hexagonalcrystal lattice of selenium, knowing that the network parameters?0=4,3662 ? and ?0=4,9536 ? .
