The Structure and Dynamics of Sodium Disilicate

Details The Structure and Dynamics of Sodium Disilicate The Structure and Dynamics of Sodium Disilicate

1999-04-06

arxiv.org/abs/cond-mat/9904066v1

Phil. Mag. B, 79, 1981 (1999)

Physics

Condensed Matter

Statistical Mechanics

7 pages of Latex, 3 figures

Scientific paper

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.

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