Abstract
The structure of silica activated by different substituents/activators, Rn (Table I) was analysed by the method of radial distribution functions. The structural parameters of the space configuration of silica were determined beforehand. Fourier analysis of the angular distribution of X-ray radiation supports the existence of a tetrahedral configuration of silicon with respect to oxygen in a silica of the SiO2 + Rn type. The preliminary analysis makes grounds for further quantitative analysis, which permits the construction of a structural model of pure and activated silica with the activators built in it, and quantitative analysis of the local ordering degree in larger areas. Further specification of the structural parameters obtained by radial distribution functions [1], and of the parameters of long-range ordering obtained in the method of small-angle diffusion by Guinier analysis, are the next stage of the studies of approximation of the real structure of the analysed noncrystalline system, and are discussed in subsequent papers [1].
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