1.5.2 Structure of Graphite Other forms of Carbon such as graphite and fullerene are also covalent bonded but the structures are entirely different. Graphite has a layered structure where in each layer, carbon atoms are sp2 hybridized and they make a hexagonal pattern. However, the bonding between individual layers is Van der Walls type of bonding. That is why Graphite is a soft material and is used as a lubricant. Figure 1.22 Structure of Graphite