Cyclohexane:

Carbon to carbon separation: 0.153 nm

Melting point: 6.5 �C

Boiling point: 80.74 �C

Benzene:

Carbon to carbon separation: 0.139 nm

Melting point: 5.5 �C

Boiling point: 80.1 �C

Graphite:

Carbon to carbon separation: 0.142 nm

Layer to layer spacing: 0.34 nm

Carbon Nanotubes:

Diameter of tube: Variable depending on structure

For more information see:

Nanotechnology Now: Carbon Nanotubes 101

C60 Buckyball:

Carbon to carbon separation: 0.144 nm (average)

Diameter: 1.02 nm

Buckyballs can also be constructed with 20, 26 and 70 carbons

For more information see:

Wikipedia: Fullerenes

Wikipedia: Buckminsterfullerene (C60)

Nanotechnology Now: Nanotubes and Buckyballs