title: Quantification of the disorder in network-modified silicate glasses.
abstract: 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.
authors.affiliation: Department of Geology, Stanford University, California 94305.
authors.forename: I
authors.initials: I
authors.lastname: Farnan
authors.forename: P J
authors.initials: PJ
authors.lastname: Grandinetti
authors.forename: J H
authors.initials: JH
authors.lastname: Baltisberger
authors.forename: J F
authors.initials: JF
authors.lastname: Stebbins
authors.forename: U
authors.initials: U
authors.lastname: Werner
authors.forename: M A
authors.initials: MA
authors.lastname: Eastman
authors.forename: A
authors.initials: A
authors.lastname: Pines
mesh_terms: D005898:Glass; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012824:Silicic Acid / Q000737:chemistry*
chemical_list: D012824:Silicic Acid