Miller Indices - Chemical bomding in engineering chemistry
In this case, an atom occupies each lattice point. The coordinate system used here is also shown in Fig 1 (b). Several lines can be drawn in this lattice such that at least one (or more) atoms lie on the lines. A few examples are shown. The unit cell for the Lattice in Fig 18.3 (a) is a square. Lines 1 and 2 are similar in that atoms lie on these at the same separations. Line 3 is less "densely packed", i.e., the distance between adjacent atoms is larger than that in lines 1 and 2. We need a system to label or characterize each of these lines. In three dimensions our interest would be the different planes of atoms.