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<p>The H<sub>2</sub>O molecules from the coordination spheres of the cations within the channels of the natural zeolite clinoptilolite were extracted by heating in the range of 100–450&#xa0;°C, followed by condensation. The collected aliquot (water sample) was then subjected to low-temperature powder XRD analysis to study the <i>in situ</i> formed ice. The peaks observed in the powder XRD pattern were confirmed to correspond to a hexagonal ice structure. Additionally, probable minor satellite phase was present, exhibiting lower-intensity peaks with slightly greater d-spacing values indicating a larger unit cell and a correspondingly less dense ice structure. Further studies of the isolated “zeolitic water” are planned. Recommendations are given for use of this approach in cases of other zeolites or H<sub>2</sub>O (and/or OH<sup>−</sup>) containing minerals or amorphous natural materials.</p>

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Extraction/condensation of H2O molecules from the natural zeolite clinoptilolite and powder XRD study of the ice formed

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • O. E. Petrov,
  • B. L. Shivachev

摘要

The H2O molecules from the coordination spheres of the cations within the channels of the natural zeolite clinoptilolite were extracted by heating in the range of 100–450 °C, followed by condensation. The collected aliquot (water sample) was then subjected to low-temperature powder XRD analysis to study the in situ formed ice. The peaks observed in the powder XRD pattern were confirmed to correspond to a hexagonal ice structure. Additionally, probable minor satellite phase was present, exhibiting lower-intensity peaks with slightly greater d-spacing values indicating a larger unit cell and a correspondingly less dense ice structure. Further studies of the isolated “zeolitic water” are planned. Recommendations are given for use of this approach in cases of other zeolites or H2O (and/or OH−) containing minerals or amorphous natural materials.