Hello, I am trying to create a modified graphene lattice which consists of not hexagons but pentagons and heptagons, like the one in the following link: https://www.researchgate.net/figure/Geometrically-optimized-structure-of-5-7-graphene-polymorphic-T1-T3-types_fig1_338429079
Can anyone help how can I do that? Thanks, Ran