J. Phys. Chem. B 2004, 108, 7557-7564
7557
High-Resolution Multinuclear NMR Structural Study of Binary Aluminosilicate and Other Related Glasses S. Sen* and R. E. Youngman Glass Research DiVision, Corning Incorporated, Corning, New York 14831 ReceiVed: December 31, 2003; In Final Form: March 20, 2004
The structure of homogeneous binary SiO2-Al2O3 glasses with 0.4 to up to 12.0 wt % Al2O3 have been studied using high-resolution 27Al, 17O, and 29Si NMR spectroscopic techniques. All glasses are found to contain a mixture of 4-, 5-, and 6-fold coordinated Al sites (AlIV, AlV, and AlVI). The relative proportions of these sites are strongly dependent on composition with AlIV (AlV) being most dominant in glasses with
