Rings in Other Borates and Thioborates

In boro-silicates or boro-phosphates with a low content of modifiers, the network topology has to accommodate both trigonal and tetrahedral units. This raises interesting questions related to the glass homogeneity are the two types of units randomly distributed or are there locally enriched regions Not surprisingly, microscopic simulations are still very scarce [92, 105, 112, 215], 

in Borate Glasses, Crystals and Melts, ed. by A.C. Wright, S.A. FeUer, A.C. Hannon (Soc. Glass Technol, Sheffield, 1997), p. 407 

Nicholas, J. Kieffer, J. Bass, J. Phys. Condens. Mater. 74, 224107 (2006) 

W Zwanziger, Solid State Nucl. Magn. Reson. 27, 5 (2005) 

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