V 58 Vibrational Spectra of Sulfoborate Glasses [Text] / V. G. Vyatchina, L. A. Perelyaeva, M. G. Zuev, I. V. Baklanova, V. L. Mamoshin // Inorganic Materials. - 2005. - Vol. 41, № 10. - P1128-1130 : il. - Библиогр. : с. 1130 (9 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СТЕКЛА СУЛЬФАТОБОРАТНЫЕ -- СТРУКТУРА СТЕКЛА Аннотация: The glass-forming regions in the MgSO4-Na2B4O7-K2SO4 and MgSO4-Na2B4O7-KHSO4 systems are shown to lie in the borate-rich corner of the composition triangle and to occupy about 20% of its area. IR and Raman spectroscopy results are used to develop a structural model of the glasses studied. Vibrational spectra suggest that the structure of the glasses is governed by borate glass-forming groups, which incorporate tetrahedra Полный текст |
S 89 Structure of Glasses in the Na2SO4–P2O5–H2O System / A. M. Nepomiluev, R. N. Pletnev, O. B. Lapina, S. G. Kozlova, V. G. Bamburov // Glass Physics and Chemistry. - 2002. - Vol. 28, № 1. - P1-4 : il. - Bibliogr. : p. 4 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СТРУКТУРА СТЕКЛА -- ЯМР -- СТЕКЛА ФОСФАТНО-СУЛЬФАТНЫЕ Аннотация: The structure of sulfate–phosphate glasses is investigated by high-resolution 31P solid-state nuclear magnetic resonance with magic-angle sample spinning (31P MAS NMR spectroscopy). The structure parameters that account for the number of different types of phosphorus–oxygen structural units involved in the glass network are determined, and the main structural units of the glasses under investigation are revealed. The role of H2O and Na2SO4 as modifiers of the structural network of sulfate–phosphate glasses is clarified Полный текст |