Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 357, Issue 6-7, Pages 1603-1608Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2011.01.007
Keywords
v-SiO(2); Glass structure; Middle-range order; Silicooxygen rings
Funding
- Polish Ministry of Science and Higher Education [N N507393135]
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Due to the absence of the long-range order, the X-ray methods usually applied in the studies of crystalline materials are of low applicability in the investigations of glasses. Therefore, spectroscopic methods, such as Middle Infrared (MIR), which make it possible to 'see' the short- and the middle-range orders are extremely suitable in their studies. MIR investigations have shown that the glasses studied exhibit domain composition, which corresponds to the order of certain crystalline phases. Analysis of the MIR spectra of simple silicate glasses and their mathematical decomposition allowed us to identify the bands characteristic for ring systems as well as those originating from Si-O(-), Si = O defects. Appearance of the bands characteristic for pseudolattice ring vibrations (740-600 cm(-1)) in the MIR spectra of glasses is an evidence of the existence of over-tetrahedral order. (C) 2011 Elsevier B.V. All rights reserved.
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