We have obtained the X-ray total scattering patterns at wavelength 0.20735 ? and corresponding to them radial distribution functions (RDF) of electron density for glasses in the La2O3–Nb2O5–B2O3 and BaO–Nb2O5–P2O5 systems. The RDF demonstrate separate peaks at distances below ~1 nm which points on the middle range ordering in the considered glasses. The consideration of RDF for BaO–Nb2O5–P2O5 glasses system with high concentration of BaO show that the middle range order is caused by the polyhedra chains of ideal BaO crystal, and these chains does not belong to any low-index crystal plane. For La2O3–Nb2O5–B2O3 glasses system the polyhedra chains are observed which resemble those in the LaB3O6 crystal, with polyhedra bound through borate groups. For all considered glasses the niobium polyhedra does not form extended chains.
Leon A. Avakyan – Dr of Physico-Mathematical Sciences, Professor, Department of Theoretical and Computational Physics, Faculty of Physics, Southern Federal University (SFedU), Rostov-on-Don, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Roman O. Alekseev – lead engineer, Department of Chemical Technology OF Glass and Glass-Ceramics, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Julia A. Firsova – PhD Student, Department of Chemical Technology of Glass and Glass-Ceramics, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia; Head of the Design and Technology Bureau of Optical Media Cooking of the Research and Production Complex, Corporation “Lytkarino Optical Glass Plant”, Lytkarino, Russia E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Egor A. Tretyakov – PhD student, Department of Theoretical and Computational Physics, Faculty of Physics, Southern Federal University (SFedU), Rostov-on-Don, Russia E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Yaroslav A. Vakulenko – PhD student, Department of Theoretical and Computational Physics, Faculty of Physics, Southern Federal University (SFedU), Rostov-on-Don, Russia E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Georgy Y. Shakhgil’dyan – PhD in Chemistry, Deputy Vice-Rector for Development of Educational Programs and International Activities; Associate Prof., Department of Chemical Technology of Glass and Glass-Ceramics, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Lusegen A. Bugaev – Dr of Physico-Mathematical Sciences, Head of the Department of Theoretical and Computational Physics, Faculty of Physics, Southern Federal University (SFedU), Rostov-on-Don, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Vladimir N. Sigaev – DSc. in Chemistry, Professor, Head of the International Center of Laser Technologies, Head of the P. D. Sarkisov International Laboratory of Functional Glass-based Materials, Head of the Department of Chemical Technology of Glass and Glass-Ceramics of the Mendeleev University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
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