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Abstract <p>The structure of ZnZrF<sub>6</sub>·6H<sub>2</sub>O and ZnZrF<sub>6</sub>·5H<sub>2</sub>O (high- and low-temperature forms) crystal hydrates and products of their thermal destruction ZnZrF<sub>6</sub>·4H<sub>2</sub>O, ZnZrF<sub>6</sub>·2H<sub>2</sub>O, ZnZrF<sub>6</sub>, and ZnZr<sub>2</sub>F<sub>10</sub>·2H<sub>2</sub>O have been studied. With the exception of ZnZr<sub>2</sub>F<sub>10</sub>·2H<sub>2</sub>O, compounds of ZnZrF<sub>6</sub>·<i>n</i>H<sub>2</sub>O (<i>n</i>&#xa0;= 6, 5, 4, 2, 0) are isostructural to their formula analogs NiZrF<sub>6</sub>·6H<sub>2</sub>O, α- and β-MgZrF<sub>6</sub>·5H<sub>2</sub>O, CuZrF<sub>6</sub>·4H<sub>2</sub>O, MgZrF<sub>6</sub>·2H<sub>2</sub>O, and MgZrF<sub>6</sub>, respectively. The structure of ZnZr<sub>2</sub>F<sub>10</sub>·2H<sub>2</sub>O is built of unique infinite network anionic layers <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11502_2025_3751_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(_{\infty }^{2}\)</EquationSource> <!--InrgChem2460397Saiankina-m1--> </InlineEquation>[Zr<sub>2</sub>F<sub>10</sub>]<sup>2–</sup>, in which ZrF<sub>8</sub> square antiprisms are formed tetranuclear cycles and are shared six of their vertices with four neighboring Zr-polyhedra according to the law “…–edge–edge–vertex–vertex–…”; ZnF<sub>4</sub>(H<sub>2</sub>O)<sub>2</sub>-octahedra link Zr-layers to each other into a framework.</p>

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Structural Transitions during Thermal Destruction in Family of Zinc Fluoridozirconate Crystal Hydrates

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • K. A. Saiankina,
  • N. A. Didenko,
  • N. N. Savchenko,
  • A. V. Gerasimenko

摘要

Abstract

The structure of ZnZrF6·6H2O and ZnZrF6·5H2O (high- and low-temperature forms) crystal hydrates and products of their thermal destruction ZnZrF6·4H2O, ZnZrF6·2H2O, ZnZrF6, and ZnZr2F10·2H2O have been studied. With the exception of ZnZr2F10·2H2O, compounds of ZnZrF6·nH2O (n = 6, 5, 4, 2, 0) are isostructural to their formula analogs NiZrF6·6H2O, α- and β-MgZrF6·5H2O, CuZrF6·4H2O, MgZrF6·2H2O, and MgZrF6, respectively. The structure of ZnZr2F10·2H2O is built of unique infinite network anionic layers \(_{\infty }^{2}\) [Zr2F10]2–, in which ZrF8 square antiprisms are formed tetranuclear cycles and are shared six of their vertices with four neighboring Zr-polyhedra according to the law “…–edge–edge–vertex–vertex–…”; ZnF4(H2O)2-octahedra link Zr-layers to each other into a framework.