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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Highly kinked uranyl chromate nitrate layers in the crystal structures of A[(UO _2)(CrO _4)(NO _3)] (A = K, Rb)
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Highly kinked uranyl chromate nitrate layers in the crystal structures of A[(UO _2)(CrO _4)(NO _3)] (A = K, Rb)

机译:A [(UO _2)(CrO _4)(NO _3)](A = K,Rb)晶体结构中的高度扭结的硝酸铀酰铬酸盐层

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摘要

Two first uranyl chromate nitrates, K[(UO _2)(CrO _4)(NO _3)] (1) and Rb[(UO _2)(CrO _4)(NO _3)] (2), were prepared by solid-state reactions and characterized by electron microprobe analysis and single-crystal X-ray diffraction. The compounds are isotypic [1: monoclinic, P2 _1/c, a = 9.881(5), b = 7.215(4), c = 14.226(6) ?, β = 124.85(3)°, V = 832.3(7) ? 3; 2: monoclinic, P2 _1/c, a = 9.804(1), b = 7.359(1), c = 14.269(1) ?, β = 122.048(4), V = 872.6(1) ? 3]. The structures of 1 and 2 are based upon the complex [(UO _2)(CrO _4)(NO _3)] ~- layers with unprecedented structural topology, which consist of the UrO _3NO _3 units linked through CrO _4 tetrahedra. The resulted kinked layer can be divided into chains arranged in the ladder fashion. The layers are parallel to (100) and are linked by A ~+ (A = K, Rb) cations located between the layers.
机译:通过固态法制备了两个第一铀酰铬酸盐硝酸盐K [(UO _2)(CrO _4)(NO _3)](1)和Rb [(UO _2)(CrO _4)(NO _3)](2)。反应,并通过电子探针分析和单晶X射线衍射进行表征。这些化合物是同型的[1:单斜晶系,P2 _1 / c,a = 9.881(5),b = 7.215(4),c = 14.226(6)α,β= 124.85(3)°,V = 832.3(7) ? 3; 2:单斜晶,P 2 _1 / c,a = 9.804(1),b = 7.359(1),c = 14.269(1)α,β= 122.048(4),V = 872.6(1)α。 3]。 1和2的结构基于具有前所未有的结构拓扑的复杂[(UO _2)(CrO _4)(NO _3)]-层,该层由通过CrO _4四面体链接的UrO _3NO _3单元组成。可以将得到的扭结层分成梯形排列的链。层平行于(100),并通过位于层之间的A〜+(A = K,Rb)阳离子连接。

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