Quantification of the disorder in network-modified silicate glasses.
Local order in silicate glasses has been observed by many experimental techniques to be similar to that in crystalline materials. Details of the intermediate-range order are more elusive, but essential for understanding the lack of long-range symmetry in glasses and the effect of composition on glass structure. Two-dimensional 17O dynamic-angle-spinning nuclear magnetic resonance experiments reveal intermediate-range order in the distribution of inter-tetrahedral (Si-O-Si) bond angles and a high degree of order in the disposition of oxygen atoms around the network-modifying cations.
Farnan
I
I
Department of Geology, Stanford University, California 94305.
Grandinetti
P J
PJ
Baltisberger
J H
JH
Stebbins
J F
JF
Werner
U
U
Eastman
M A
MA
Pines
A
A
D005898:Glass; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012824:Silicic Acid / Q000737:chemistry*
D012824:Silicic Acid