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A fragmentary model of vitreous As2S3

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Abstract

The X-ray scattering intensity curves for vitreous As2S3 are experimentally measured using soft (copper) and hard (molybdenum) X rays. The inclusion of all the specific features revealed in the experimental scattering intensity curves makes it possible to obtain the experimental atomic radial distribution function (ARDF) in the ordering range up to ∼1 nm. The experimental ARDF is interpreted in the framework of the fragmentary model. A comparison of the experimental ARDF with the model ARDF calculated from the crystal structure data obtained for orpiment demonstrates that the corrugated layers inherent in crystalline As2S3 are retained in the glass structure but the characteristic interlayer interatomic distances are absent. The layers are joined together through the As4S5 molecular clusters. Microcrystals consisting of several unit cells are absent in the glass structure, which involves only the structural fragments of both crystalline analogs. One of the possible variants of their joining is proposed.

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Authors and Affiliations

  1. Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006, Russia

    K. B. Aleynikova, N. I. Likhach & E. N. Zinchenko

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  1. K. B. Aleynikova
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  2. N. I. Likhach
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  3. E. N. Zinchenko
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Correspondence to E. N. Zinchenko.

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Original Russian Text © K.B. Aleynikova, N.I. Likhach, E.N. Zinchenko, 2008, published in Fizika i Khimiya Stekla.

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Aleynikova, K.B., Likhach, N.I. & Zinchenko, E.N. A fragmentary model of vitreous As2S3 . Glass Phys Chem 34, 274–281 (2008). https://doi.org/10.1134/S1087659608030073

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