Abstract
Silicate glasses have conventionally been regarded as silicate frameworks in which cations are distributed at random. Neutron scattering from isotopically substituted samples allows correlations between cations to be investigated beyond the nearest-neighbour coordination shell, and shows that a degree of ordering persists over distances approaching 1 nm. The structural picture that emerges has elements of long-range random-ness coexisting with both short- and medium-range order.
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Gaskell, P., Eckersley, M., Barnes, A. et al. Medium-range order in the cation distribution of a calcium silicate glass. Nature 350, 675–677 (1991). https://doi.org/10.1038/350675a0
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DOI: https://doi.org/10.1038/350675a0
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