In addition to the buckminsterfullerene and graphene, this element also forms a three-dimensional lattice that is among the hardest structures known to man, and a soft conductor used in pencil lead.
One allotrope of this element is often described as a truncated icosahedron, and was discovered by Curl, Kroto, and Smalley. Another allotrope of this element consists of a single layer of hexagonal rings. In addition to the buckminsterfullerene and graphene, this element also forms a three-dimensional lattice that is among the hardest structures known to man, and a soft conductor used in pencil lead. For 10 points, name this element whose allotropes include diamond and graphite.
One allotrope of this element is often described as a truncated icosahedron, and was discovered by Curl, Kroto, and Smalley.
{carbon} [or {C}]