Graphite is made entirely of carbon. Each C arbon forms two single bonds to neighbouring atoms, plus one double bond.

Geometry: Each carbon is planar trigonal.

The pattern of double bonds is not fixed: Each carbon can form a double bond with any one of the three neighbouring atoms. This allows each sheet of carbon atoms to conduct electricity.

The bonding between the sheets is weak van der Waals' attraction. The sheets can slide over one another which makes graphite soft, slippery and brittle.