Locating Tetrahedral Voids
- Take a unit cell of ccp or fcc lattice divide into eight small cubes with each small cube having atoms at alternate corners.
- Thus, each small cube has 4 atoms that on joining to each other make a regular tetrahedron.
- Thus, there is one tetrahedral void in each small cube and eight tetrahedral voids in total.
- Each of the eight small cubes have one void in one unit cell of ccp
- ccp structure has 4 atoms per unit cell. Thus, the number of tetrahedral voids is twice the number of atoms.