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Related Experiment Video

Updated: Jun 15, 2026

X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects
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Short-and Intermediate-Range Structural Ordering in Glassy Boron Oxide.

R E Youngman, S T Haubrich, J W Zwanziger

    Science (New York, N.Y.)
    |September 8, 1995
    PubMed
    Summary
    This summary is machine-generated.

    Short- and intermediate-range order in boron oxide glass is explained by structural units. Nuclear magnetic resonance (NMR) reveals molecular arrangements, including boroxol rings, responsible for this glassy state ordering.

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    Published on: February 1, 2020

    Area of Science:

    • Materials Science
    • Solid-State Chemistry
    • Condensed Matter Physics

    Background:

    • Ordering at short-length scales is a known characteristic of the glassy state.
    • Evidence suggests that ordering on mesoscopic-length scales might also be universal across materials.
    • Understanding the structural basis of order in glasses is crucial for materials science.

    Purpose of the Study:

    • To investigate the structural units responsible for short- and intermediate-length scale ordering in boron oxide glass.
    • To provide evidence for the universality of mesoscopic-length scale ordering in glassy materials.
    • To elucidate the molecular-level details of structural ordering in boron oxide glass using advanced NMR techniques.

    Main Methods:

    • High-resolution Oxygen-17 Nuclear Magnetic Resonance (NMR) spectroscopy was employed to study boron oxide glass.
    • Boron-11 NMR and scattering techniques were used for corroborative analysis.
    • Analysis focused on identifying specific structural units and their arrangement within the glass network.

    Main Results:

    • Planar BO(3/2) units were identified as the key molecular structures responsible for local ordering.
    • Oxygen-17 NMR spectra revealed the detailed inclusion of these units in boroxol rings and bridging oxygen configurations.
    • The study found evidence for domains rich or poor in boroxol rings within the boron oxide glass structure.

    Conclusions:

    • The identified structural units, particularly boroxol rings and their arrangements, are the basis for short- and intermediate-range order in boron oxide glass.
    • These findings support the hypothesis that mesoscopic-length scale ordering is a universal feature of the glassy state.
    • The proposed domain structure (rich/poor in boroxol rings) provides a structural explanation for intermediate-range order in glassy boron oxide.