The energetic ground state of gold clusters with up to 314 atoms consists of rather complicated geometries that have only a weak resemblance to the perfect icosahedra, decahedra and octahedra that are encountered for some magic numbers. The structure changes in most cases completely by the addition of a single atom. Other low energy structures are so close in energy that their Boltzmann weight is not negligible at room temperature.
Cite
@article{arxiv.0810.2052,
title = {Structural fuzziness of large gold clusters},
author = {Kuo Bao and Stefan Goedecker and Kenji Koga and Frederic Lancon and Alexey Neelov},
journal= {arXiv preprint arXiv:0810.2052},
year = {2008}
}