Can you explain the properties of a giant covalent lattice?

It is really important to note here that there are no intermolecular force of attraction between the molecules, compared to simple covalent molecules. There are only strong covalent bonds which means that giant covalent lattices have very high melting points. (Include a diagram of graphite, graphene, and diamond) and how they have different electrical conductivities due to delocalised or localised electron that can carry a charge. In graphene there are weak intermolecular attractions (notice exception here) between the layers which means it can slide, graphite the delocalised electron means that it can carry a charge and therefore conduct electricity.