... CRYSTALLOGRAPHY AND CRYSTAL STRUCTURES Figure 5.6 Miller indices in cubic crystals: (a) ð1 1Þ and (b) ð1 " 1Þ Figure 5.5 Miller indices of crystal planes in a cubic crystal: (a) (1 0) and ð"1 0Þ;... Section 5.3.2 5.1.3 Symmetry and crystal classes The shape and symmetry of crystals attracted the attention of early crystallographers and, until the internal structure of crystals could be determined,... cell 5.1.2 Crystal structures and crystal systems All crystal structures can be built up from the Bravais lattices by placing an atom or a group of atoms at each lattice point The crystal structure