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Structure of Ancient Glass by 29 Si Magic Angle Spinning NMR Spectroscopy
Henry Bradford1, Amy Ryder2, Julian Henderson1,3
1Department of Classics and Archaeology, School of Humanities, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
Abstract:
29 Si magic angle spinning (MAS) NMR spectroscopy has been applied for the first time to the structural analysis of ancient glass samples obtained from archaeological excavations. The results show that it is possible to establish the distribution of Si environments in ancient glass by 29 Si MAS NMR, so long as the concentrations of magnetic impurities, such as Mn and Fe oxides, are low. In general, good agreement has been obtained with compositions determined by means of electron probe microanalysis. In addition, the 29 Si MAS NMR data reveal structural differences between glasses manufactured at separate ancient sites.
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