By studying the structures of clusters bound by a model potential that favours polytetrahedral order, we find a previously unknown series of `magic numbers' (i.e. sizes of special stability) whose polytetrahedral structures are characterized by disclination networks that are analogous to hydrocarbons.
@article{arxiv.cond-mat/0012333,
title = {Polytetrahedral Clusters},
author = {Jonathan Doye and David Wales},
journal= {arXiv preprint arXiv:cond-mat/0012333},
year = {2007}
}