graphite lattice model

I've described models of three types of elemental carbon, "Buckyballs", "Nanotubes", and a "Diamond Lattice Model". Graphite, the most common form of carbon, remains to be done. The Naval Research Laboratory crystal site has a very nice section on carbon
http://cst-www.nrl.navy.mil/lattice/struk/carbon.html
that has information about 3 forms of graphite. Coordinates of the forms are available as well as rotatable models that can be viewed with a javascript applet.

November 13, 2019 - The NRL site seems to have been discontinued - See "Carbon and Related Structures" at - https://homepage.univie.ac.at/michael.leitner/lattice/

The common A9 hexagonal form appears to be the easiest to print. It's simple enough so that coordinates can be calculated with pencil and paper allowing one to position the model for the benefit of the printer. The A9 graphite structure consists of planar sheets of carbon atoms with a bond distance of 1.42 Angstroms in a hexagonal array. Alternate