%0 Journal Article %T The Structure and Dynamics of Sodium Disilicate %A Jurgen Horbach %A Walter Kob %J Physics %D 1999 %I arXiv %X We investigate the structure and dynamics of sodium disilicate by means of molecular dynamics computer simulation. We show that the structure is described by a partially destroyed tetrahedral SiO_4 network and a spherical super structure formed by the silicon and sodium atoms. The static structure factor of our simulation is in very good agreement with one from a neutron scattering experiment. For 1008 particles we find strong finite size effects in the dynamics which are due to the missing of modes contributing to the boson peak. %U http://arxiv.org/abs/cond-mat/9904066v1