Diversity of [M(IO3)6] Building Blocks in Iodate Families and the New Trigonal Polymorph of Cs2HIn(IO3)6

IF 0.6 4区材料科学 Q4 CRYSTALLOGRAPHY

Crystallography Reports Pub Date : 2024-09-27 DOI:10.1134/S1063774524601382

O. V. Reutova, E. L. Belokoneva, A. S. Volkov, O. V. Dimitrova

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Abstract

Crystals of a new high-symmetry structural modification of Cs₂HIn(IO₃)₆ which crystallizes in sp. gr. R\(\bar {3}\) with the unit cell parameters a = 11.8999(4) Å, c = 11.6513(5) Å, was obtained under hydrothermal conditions. The crystal-chemical comparison with the previously characterized triclinic modification of this compound was carried out. Both structures are composed of isolated [In(IO₃)₆]^3– blocks. The new modification belongs to the family of trigonal iodates isostructural with the compound K₂Ge(IO₃)₆. The local symmetry of individual [M(IO₃)₆] blocks (M = Ge, Ti, Sn, Ga, In, and some other metals) was analyzed. The structural systematics of iodate families was proposed based on the comparative crystal-chemical analysis. The influence of the cation composition and the synthesis conditions on the symmetry and topology of the crystal structures and the effect of the local symmetry of individual blocks on the physical properties of the compounds are discussed.

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碘酸盐家族中[M(IO3)6]构件的多样性和 Cs2HIn(IO3)6 的新三方多晶体

在水热条件下，获得了 Cs2HIn(IO3)6 的一种新的高对称性结构修饰晶体。R\(\bar {3}\)，单胞参数 a = 11.8999(4) Å，c = 11.6513(5) Å。该化合物的晶体化学结构与之前表征的三菱形结构进行了比较。两种结构都是由孤立的[In(IO3)6]3-块组成。这种新的改性属于与化合物 K2Ge(IO3)6 结构相同的三棱碘酸盐家族。分析了各个 [M(IO3)6] 嵌段（M = Ge、Ti、Sn、Ga、In 和其他一些金属）的局部对称性。根据晶体化学对比分析，提出了碘酸盐家族的结构系统学。讨论了阳离子组成和合成条件对晶体结构对称性和拓扑结构的影响，以及单个嵌段的局部对称性对化合物物理性质的影响。

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来源期刊

Crystallography Reports 化学-晶体学

CiteScore

1.10

自引率

28.60%

发文量

审稿时长

4-8 weeks

期刊介绍： Crystallography Reports is a journal that publishes original articles short communications, and reviews on various aspects of crystallography: diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV-VIS and IR spectroscopy; growth, imperfect structure and physical properties of crystals; thin films, liquid crystals, nanomaterials, partially disordered systems, and the methods of studies.