D_{3d} T252 & T600

I found an interesting case of TCNT while playing with the newly written Matlab code...

D_{3d} T252


& T600



They are like puncturing a hole through an octahedral fullerene...

D_{3h} T240

Unlike the TCNTs we constructed before, this one is obtained by extending the edges of one Schwartz-H graphenoid unit cell. In other hand, it can be realized as retracting three nonadjacent "arms" of the normal type D_{6h} TCNT 'till twelve pairs of 5/7-gons meet and merge into six pairs of 4/8-gons...

Helix

Chuang created this beautiful helix. Click on the following figure to see the helix roughly in its original size.