Silicate glasses embedded cluster model

Embedded Cluster Models for Electronic States of Silicate Glasses... 

When the supersaturated solution is close to the binodal curve (the solubility limit), the transformation occius through the mechanism of nucleation and growth of a minor new phase. This leads to a two-phase material composed of isolated amorphous or crystalline clusters embedded in the homogeneous matrix. The growth of these clusters can be characterized by SAXS, using a model of either a dilute or concentrated set of spherical clusters, as described in the sections Basic theory and Growth of PbTe nanocrystals embedded in a silicate glass . 

The discrete variational (DV) Xa method is applied to the study of the electronic structure of silicate glasses in embedded model clusters. The effects of the cluster size, the size of embedded imits, and the Si-0-Si bond angles on the electronic states are discussed. Embeddii units drastically improve the description of the electronic state, when compared to the isolated Si044- cluster, which is the structural unit of silicate glasses e.g., the Fermi energy for the embedded cluster becomes smaller when compared to that of the... 

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