%0 Journal Article
%T In situ high pressure and high temperature Raman studies of (1-x)SiO2xGeO2 glasses
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM)
%A Le Parc, Rozenn
%A Ranieri, Vincent
%A Haines, Julien
%A Cambon, Martine
%A Cambon, Olivier
%A Levelut, Claire
%A Clément, Sébastien
%< avec comité de lecture
%@ 0953-8984
%J Journal of Physics: Condensed Matter
%I IOP Publishing
%V 21
%P 375109
%8 2009-09-16
%D 2009
%R 10.1088/0953-8984/21/37/375109
%Z Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]Journal articles
%X The structure of glasses in the binary system SiO2-GeO2 has been studied by Raman spectroscopy. Our results are consistent with mixing of SiO2 and GeO2 tetrahedra. The changes induced by temperature and by pressure on the structure are monitored by in situ measurements on the same mixed glasses. Anomalous temperature dependences are observed not only for SiO2 glass and GeO2 glass but also for mixed glasses. Particular attention is focused on the pressure densification mechanism in mixed glasses. Via the pressure dependence of the width of the main Raman band, we show that the compression mechanism in mixed glasses is intermediate between that of the end members.
%G English
%L hal-00434405
%U https://hal.science/hal-00434405
%~ CNRS
%~ UNIV-MONTP1
%~ UNIV-MONTP2
%~ ENSC-MONTPELLIER
%~ ICG
%~ LCVN
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ UM1-UM2
%~ TEST2-HALCNRS