TY - JOUR
T1 - The structure and dynamics of alkali silicate liquids
T2 - A view from NMR spectroscopy
AU - Stebbins, Jonathan F.
AU - Farnan, Ian
AU - Xue, Xianyu
N1 - Funding Information:
We would like to expresso ur gratitudeto the organizerso f the Le Hohwald Workshop on Liquid Silicatesa nd of this special issue (Yan Bottinga, Don Dingwell and Pascal Richet). Professor B o t t i n g a ' sc o m m e n t so n a draft of this paper led to its substantiailm provement. Discussionsw ith Gordon Brown, Don Ding-well, Paul McMillan and Pascal Richet have been particularlyu seful. This work was supported by NSF g r a n t sE A R 8 9 0 5 1 8 8a n d EAR 8553024.M ost of the data presentewd erecol-lected with a spectrometefra cility funded in part by the NSF through the Stanford Center for MaterialsR esearch.
PY - 1992/4/15
Y1 - 1992/4/15
N2 - Understanding and predicting the macroscopic properties of silicate liquids require information on both structure and dynamics. Studies of glass structure provide a convenient starting point, but only represent the liquid at the rather low temperature of transition from glass to liquid. In situ high-T studies, as well as work on glasses with varying fictive temperature, can provide more information on structural changes with T and on dynamical mechanisms. Here we discuss the application of NMR spectroscopy to both kinds of approaches. We present results, primarily from our laboratory, on anionic species distributions, on silicon and oxygen site exchange in liquids and its relationship to viscosity, and on the quantification of the abundances of five- and six-coordinated Si in high-pressure and 1-bar-pressure glass samples.
AB - Understanding and predicting the macroscopic properties of silicate liquids require information on both structure and dynamics. Studies of glass structure provide a convenient starting point, but only represent the liquid at the rather low temperature of transition from glass to liquid. In situ high-T studies, as well as work on glasses with varying fictive temperature, can provide more information on structural changes with T and on dynamical mechanisms. Here we discuss the application of NMR spectroscopy to both kinds of approaches. We present results, primarily from our laboratory, on anionic species distributions, on silicon and oxygen site exchange in liquids and its relationship to viscosity, and on the quantification of the abundances of five- and six-coordinated Si in high-pressure and 1-bar-pressure glass samples.
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U2 - 10.1016/0009-2541(92)90066-E
DO - 10.1016/0009-2541(92)90066-E
M3 - Article
AN - SCOPUS:0026480418
VL - 96
SP - 371
EP - 385
JO - Chemical Geology
JF - Chemical Geology
SN - 0009-2541
IS - 3-4
ER -