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−x K 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.

中文翻译：

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

已知化合物 (NaCl)[Cu(HSeO) 的两种新多晶型的晶体3个)2个]，我们称之为多晶型物 II 和 III，是在加州. 结晶沉淀物在母液中停留一年，并在 K 存在下结晶+， 分别。这两种结构都属于“层状亚硒酸铜”家族。多晶型物 II 是 (KCl)[Cu(HSeO3个)2个] 具有完全有序的 Na+地点; 主要区别在于 Cu 的环境2+在 (NaCl)[Cu(HSeO3个)2个]-二。与一些预期相反，从含有 KCl 的溶液中结晶。氯化钠、氯化铜2个, 和 H2个二氧化硒3个蒸发后不会形成混合（Na1−X 钾 X Cl)[Cu(HSeO3个)2个] 晶体，而是在 (KCl)[Cu(HSeO3个)2个] 和 (NaCl)[Cu(HSeO3个)2个]-III 具有四有序一无序Na的复杂结构+网站。较长的结晶时间可能会增强有序结构的形成。