%0 Journal Article
%T Bimodal distribution of Si-O-Si angles in sodo-silicate glasses
%+ Laboratoire Charles Coulomb (L2C)
%+ Institut de Physique du Globe de Paris (IPGP)
%A Hehlen, Bernard
%A Neuville, D. R.
%A Kilymis, Dimitrios
%A Ispas, Simona
%< avec comité de lecture
%Z L2C:17-126
%@ 0022-3093
%J Journal of Non-Crystalline Solids
%I Elsevier
%V 469
%P 39-44
%8 2017-08-01
%D 2017
%R 10.1016/j.jnoncrysol.2017.04.009
%K Glass
%K Sodo-silicates
%K Vibrations
%K Raman
%K Structure
%Z Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]Journal articles
%X Polarized Raman scattering is performed in a series of sodo-silicate glasses. The Si–O–Si inter-tetrahedral angle and its distribution are extracted using a model developed previously for densified silica, and the result are compared to ab initio atomistic calculations. The two techniques reveal a reduction of the most probable angle of about 0.30°/mol% of Na2O, but the shape of the angular distributions are different. The results suggest that Raman scattering enhances a specific angular distribution of Si–O–Si bridges, likely those close to sodium atoms, highlighting local angular heterogeneities.
%G English
%L hal-01624760
%U https://hal.science/hal-01624760
%~ INSU
%~ UNIV-PARIS7
%~ AFRIQ
%~ CNRS
%~ IPGP
%~ L2C
%~ USPC
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UNIV-PARIS
%~ UM-2015-2021