▎ 摘　　要

The paper presents a theoretical consideration of nanocones, a recently discovered allotropic form of carbon, graphene-like, structured and built of a pentagonal sp(2)-carbon-ring C-5 fused with 5 benzene rings C-6 which, in their turn, are fused with 10 ones and so on. Its topology is conically shaped and pi-system exhibits heterogeneous p-electron distribution due to non-alternant configuration of the molecule. It is shown that these nanoconical structures could be used as molecular blocks to prepare superlight solid-state substances with low densities of 0.01 g.cm(-3) and less.