As I said in the previous post, one can puncture holes on a C84 and use the resulting structures as basic units for building larger graphitic structures. Here I show two C84-derived bead models with three and four holes surrounded by heptagonal.
Of course, one can use these building blocks to make many interesting structures. I am planning to make a dodecahedron consisting of 20 tetravalent units. It is not hard to see the angle between two holes in a unit is about 109 degree which is very close to 108 degree for the inner angle of a pentagon. So one can expect that these units should be happily fitted in the resulting dodecahedron without too much distortion.