Distorted icosahedral cage structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Si</mml:mi></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>clusters

Using full-potential linear-muffin-tin-orbital molecular-dynamics method, we have performed calculations on the structure and the binding energy of cluster ${\mathrm{Si}}_{60}.$ It is found that the stable structure for ${\mathrm{Si}}_{60}$ cluster is a distorted truncated icosahedron, with ${T}_{h}$ symmetry. Its fullerene cage structure remains, but it looks like a puckered ball. The lower symmetry and four distinct Si-Si bond lengths make the structure different from that with ${I}_{h}$ symmetry and two C-C bond lengths in ${\mathrm{C}}_{60}.$