Abstract
A systematic method is described for generating arrays of triangles equivalent to extended Zachariasen schematics. The resulting “triangle rafts” are convenient tools for visualizing ideal random network structures and structural defects in a similar way to the utility of bubble rafts for demonstrating crystal structures and crystal defects. The ideal random network structure (especially the ring statistics) is conveniently characterized by a log-normal probability distribution function (PDF). Defect structures such as channels (continuous strings of large interstices) or non-bridging oxygens (in a sodium-modified glass) drive the ring statistics away from the simple log-normal PDF. For a multicomponent glass, the “clustering” of modifier ions can be visualized in the framework of a randomly generated ring structure.
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