Synthesis and crystal structure of two novel polymorphs of (NaCl)[Cu(HSeO3)2]: a further contribution to the family of layered copper hydrogen selenites

IF 0.9 4区材料科学 Q3 CRYSTALLOGRAPHY

Zeitschrift Fur Kristallographie-Crystalline Materials Pub Date : 2023-03-30 DOI:10.1515/zkri-2023-0004

V. Grishaev, O. Siidra, Mishel R. Markovski, D. Charkin, Timofey A. Omelchenko, Evgenii V. Nazarchuk

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引用次数: 2

Abstract

Abstract Crystals of two new polymorphic forms of the known compound (NaCl)[Cu(HSeO3)2], which we term polymorphs II and III, were formed after a ca. one-year dwelling of a crystalline precipitate under mother liquor and upon crystallization in the presence of K+, respectively. Both structures belong to the “layered copper hydroselenite” family. The polymorph II is a structural analog of (KCl)[Cu(HSeO3)2] with a fully ordered Na+ site; the main difference concerns the environment of Cu2+ which is more regular in (NaCl)[Cu(HSeO3)2]-II. In contrast to some expectations, crystallization from solutions containing KCl. NaCl, CuCl2, and H2SeO3 upon evaporation does not result in formation of mixed (Na1−xK x Cl)[Cu(HSeO3)2] crystals, but rather in a separate crystallization of (KCl)[Cu(HSeO3)2] and (NaCl)[Cu(HSeO3)2]-III which exhibits a complex structure with four ordered and one disordered Na+ sites. It is possible that longer crystallization times enhance formation of ordered structures.

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两种新型多晶型（NaCl）[Cu（HSeO3）2]的合成和晶体结构：对层状亚硒酸氢铜家族的进一步贡献

摘要:已知化合物(NaCl)[Cu(HSeO3)2]的两种新的多晶型晶体，我们称之为多晶型II和III，分别在母液下和K+存在下结晶沉淀约一年后形成。这两种结构都属于“层状亚硒酸铜”族。晶型II是(KCl)[Cu(HSeO3)2]的结构类似物，具有完全有序的Na+位点;主要区别在于Cu2+在(NaCl)[Cu(HSeO3)2]-II中的环境更为规则。与一些预期相反，含KCl的溶液结晶。NaCl、CuCl2和H2SeO3蒸发后不会形成混合的(Na1−xK x Cl)[Cu(HSeO3)2]晶体，而是形成(KCl)[Cu(HSeO3)2]和(NaCl)[Cu(HSeO3)2]-III的独立结晶，呈现出4个有序和1个无序Na+位的复杂结构。较长的结晶时间可能促进有序结构的形成。

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来源期刊

Zeitschrift Fur Kristallographie-Crystalline Materials CRYSTALLOGRAPHY-

CiteScore

2.00

自引率

16.70%

发文量

期刊介绍： Zeitschrift für Kristallographie – Crystalline Materials was founded in 1877 by Paul von Groth and is today one of the world’s oldest scientific journals. It offers a place for researchers to present results of their theoretical experimental crystallographic studies. The journal presents significant results on structures and on properties of organic/inorganic substances with crystalline character, periodically ordered, modulated or quasicrystalline on static and dynamic phenomena applying the various methods of diffraction, spectroscopy and microscopy.