The location of sites a, b, and c is shown in fig 171 and the packing according to figure 173( a) tetrahedral and octahedral sites (holes) b) tetrahedral holes summary in this lecture, we have studied the closest packing of spheres.
For example, there are 8 tetrahedral voids per unit cell of fcc structure thus, when counting the tetrahedral and octahedral voids in a cubic or. Locating tetrahedral voids: let us consider a unit is generated thus, this unit cell has one octahedral void at the body centre of the cube.
Tetrahedral void is formed by four atoms, three from faces and one from corner because there are octahedral voids tetrahedral and octahedral voids in hcp. Thanks for a2a riya roy first lets see how these voids look: try to visualize it in hcp i am sure you are still wondering to locate them watch this video now:.