Semiconductor Crystals - Physics Department - University College ...

Lattice Vectors – 2DThe two vectors a and bform a set of lattice vectorsfor the lattice. The choice of latticevectors is not unique.Thus one could equally welltake the vectors a and b’ asa lattice vectors.Crystal Structure 39Lattice Vectors – 3DAn ideal three dimensional crystal is described by 3fundamental translation vectors a, b and c. If there is a latticepoint represented by the position vector r, there is then also alattice point represented by the position vector where u, v and ware arbitrary integers.r’ = r + u a + v b + w cCrystal Structure 4020