Groups of graphs 3n

Possible point group of elements of the class 3n

We call 3n the class of 3-valent plane graphs whose faces are 3-gons (necesarily four 3-gons) or 6-gons. The classification of possible point groups was obtained in

P.W. Fowler, J.E. Cremona and J.I. Steer, "Systematics of bonding in non-icosahedral carbon clusters", Theor. Chim. Acta 73 (1988) 1--26.

the point group D2
the point group D2d
the point group D2h
the point group T
the point group Td