Summary
It is considered important for the student to know the structures of the materials that surround them in everyday life, so in this practice the Bravais unit cells are presented in a different way, so that once they know it, they can apply it in the construction of the crystalline structures of various metals. After building the crystalline model in spheres and bars, it will help to develop the ability of abstract thinking in one, two and three dimensions, for a better understanding of crystalline structures, by viewing them from different perspectives.