| Reference Type | Journal (article/letter/editorial) |
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| Title | Total scattering studies of silica polymorphs: similarities in glass and disordered crystalline local structure |
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| Journal | Mineralogical Magazine |
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| Authors | Keen, D. A. | Author |
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| Dove, M. T. | Author |
| Year | 2000 (June) | Volume | 64 |
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| Issue | 3 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/002646100549517Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 243184 | Long-form Identifier | mindat:1:5:243184:4 |
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| GUID | 0 |
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| Full Reference | Keen, D. A., Dove, M. T. (2000) Total scattering studies of silica polymorphs: similarities in glass and disordered crystalline local structure. Mineralogical Magazine, 64 (3) 447-457 doi:10.1180/002646100549517 |
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| Plain Text | Keen, D. A., Dove, M. T. (2000) Total scattering studies of silica polymorphs: similarities in glass and disordered crystalline local structure. Mineralogical Magazine, 64 (3) 447-457 doi:10.1180/002646100549517 |
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| Abstract/Notes | AbstractThe structure of amorphous silica has frequently been compared with its crystalline counterparts in an attempt to understand the glass structure beyond short-range correlations. This paper presents results from neutron total scattering measurements of several polymorphs of silica and shows how these can be used to make a direct, quantitative comparison of amorphous and crystalline forms. It is found that the glass is similar to HP-tridymite and β-cristobalite, both dynamically-disordered crystalline phases of silica, but only out to distances ∼7.5 Å, beyond which the structures diverge. This is too small to validate a microcrystallite theory of glass structure. It is the average 180° Si–O–Si linkage in these two crystalline phases which gives them the flexibility for their instantaneous disordered structure to resemble the quenched (static) glass structure. |
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