6533b833fe1ef96bd129c0ae

RESEARCH PRODUCT

The Importance of Intermediate Range Order in Silicates: Molecular Dynamics Simulation Studies

Kurt BinderAnke WinklerJürgen HorbachWalter Kob

subject

Materials scienceScale (ratio)Sodiumchemistry.chemical_elementSodium silicateNanotechnologySilicateIonchemistry.chemical_compoundMolecular dynamicschemistryChemical physicsTetrahedronStructure factor

description

We present the results of large scale computer simulations in which we investigate the structural and dynamic properties of silicate melts with the compositions (Na2O)2(SiO2) and (Al2O3)2(Si02). In order to treat such systems on a time scale of several nanoseconds and for system sizes of several thousand atoms it is necessary to use parallel supercomputers like the CRAY T3E. We show that the silicates under consideration exhibit additional intermediate range order as compared to silica (SiO2) where the characteristic intermediate length scales stem from the tetrahedral network structure. For the sodium silicate system it is demonstrated that the latter structural features are intimately connected with a surprising dynamics in which the one-particle motion of the sodium ions appears on a much smaller time scale than the correlations between different sodium ions.

yearjournalcountryeditionlanguage
2003-01-01
https://doi.org/10.1007/978-3-642-59354-3_9