التفاصيل البيبلوغرافية
| العنوان: |
Investigation of medium range order in silicate glasses by infrared spectroscopy |
| المؤلفون: |
Cristiane Nascimento Santos, Myriam Eckes, Patrick Echegut, Leire del Campo, Yann Vaills, Domingos De Sousa Meneses |
| المصدر: |
Vibrational Spectroscopy. 65:50-57 |
| بيانات النشر: |
Elsevier BV, 2013. |
| سنة النشر: |
2013 |
| مصطلحات موضوعية: |
chemistry.chemical_compound, Bridging (networking), chemistry, Chemical physics, Molecular vibration, Medium range, Tetrahedron, Infrared spectroscopy, Mineralogy, Low frequency, Spectroscopy, Potassium silicate, Silicate |
| الوصف: |
A new decomposition method of infrared spectra which takes into account the configurational and dynamical origins of the disorder allows retrieving structural information on short and medium range orders in potassium silicate glasses. The distribution of tetrahedral units, the occupation of cation sites, the ratio of SiO bond ionicities involving bridging and non bridging oxygen, and a measure of the impact of low frequency floppy modes on the high frequency dynamics are byproducts of the modeling process. The composition dependence of two vibrational modes clearly identified as spectral components signing medium range order, shows that the disruption of the silicate network follows selective schemes. The 3D silica like network completely disappears in glasses with K 2 O amounts greater than 11 mol% and above this threshold a progressive appearance of 2D silicate sheets is evidenced. © 2012 Elsevier B.V. |
| تدمد: |
0924-2031 |
| URL الوصول: |
https://explore.openaire.eu/search/publication?articleId=doi_________::971857e6c1d76f3d7e6825013549e4fe
https://doi.org/10.1016/j.vibspec.2012.11.015 |
| حقوق: |
CLOSED |
| رقم الأكسشن: |
edsair.doi...........971857e6c1d76f3d7e6825013549e4fe |
| قاعدة البيانات: |
OpenAIRE |
