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Asymmetry of the water molecule in crystal hydrates: IR spectra of dioptase and apophyllite

  • Physical Chemistry
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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Abstract

Asymmetry of molecules of water of crystallization in the structures of dioptase and apophyllite results in attenuation of the intramolecular interactions of OH stretching vibrations. The shifts of Δν OH from the hydrogen bond for molecules of water of crystallization in the IR spectra of dioptase and apophyllite should be read from the frequency of the OH free radical (3568 cm−1) and not from the frequency ofvOH≅ 3700 cm−1 for the isolated water molecule. The regular dependence of νOH on the length of the hydrogen bridge (Ro...o) is observed in cases where the H bond is related to the basic structure-forming factors (ice, dioptase). Apophyllite, where Ro...o is basically determined by coordination interactions, is a compound for which the vOH-Ro...o feature is not observed

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Authors and Affiliations

  1. I. V. Grebenshchikov Institute of Silicate Chemistry, Academy of Sciences of the USSR, Leningrad

    Ya. I. Ryskin & G. P. Stavitskaya

Authors
  1. Ya. I. Ryskin
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  2. G. P. Stavitskaya
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1778–1782, August, 1990.

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Ryskin, Y.I., Stavitskaya, G.P. Asymmetry of the water molecule in crystal hydrates: IR spectra of dioptase and apophyllite. Russ Chem Bull 39, 1610–1614 (1990). https://doi.org/10.1007/BF00961487

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  • DOI: https://doi.org/10.1007/BF00961487

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