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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis and crystal structure of the cesium silver permanganate Cs _3Ag[MnO _4] _4
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Synthesis and crystal structure of the cesium silver permanganate Cs _3Ag[MnO _4] _4

机译：高锰酸铯铯Cs _3Ag [MnO _4] _4的合成及晶体结构

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摘要

After successful syntheses and structural refinements of the already known permanganates of cesium (Cs[MnO _4]) and silver (Ag[MnO _4]) we started to blend aqueous solutions of both components in various molar ratios. From crystallization experiments of these mixtures only three species of crystals with different chemical compositions were obtained: tricesium monosilver tetrakispermanganate (Cs _3Ag[MnO _4] _4) and, depending upon the respective ratio, either additional silver permanganate or surplus cesium permanganate, namely. The new title compound crystallizes in the orthorhombic space group Pnnm (no. 58) with two formula units per unit cell and cell dimensions of a = 764.53(4), b = 1883.57(9) and c = 584.34(3) pm. The crystal structure of Cs _3Ag[MnO _4] _4 consists of two crystallographically distinguishable cesium cations. (Cs1) ~+ is surrounded by fourteen oxygen atoms constructing a slightly distorted bicapped hexagonal prism. These polyhedra are connected through edge-sharing with two other polyhedra of this kind to form chains along [001]. The chains are linked to each other via sixfold coordinated Ag ~+ cations (d(Ag-O) = 238-246 pm), arranged in such a manner that they link three oxygen atoms of two cesium polyhedra, leading to a two-dimensional layer spreading out parallel to the (001) plane. Together with the two crystallographically different tetrahedral oxomanganate(VII) anions [MnO _4] - (d(Mn-O) = 161-162 pm) the other kind of cesium cations ((Cs2) ~+ with CN = 13) finally connect these layers three-dimensionally.
机译：在成功合成铯（Cs [MnO _4]）和银（Ag [MnO _4]）的高锰酸盐并进行结构优化后，我们开始以各种摩尔比混合两种组分的水溶液。从这些混合物的结晶实验中，仅获得了三种化学组成不同的晶体：四高锰酸单银（Cs _3Ag [MnO _4] _4）以及取决于各自的比例的其他高锰酸银或过剩高锰酸铯。新的标题化合物在正交晶体空间群Pnnm（no。58）中结晶，每单元像元具有两个公式单位，像元尺寸为a = 764.53（4），b = 1883.57（9）和c = 584.34（3）pm。 Cs _3Ag [MnO _4] _4的晶体结构由两个晶体学上可区分的铯阳离子组成。 （Cs1）〜+被十四个氧原子包围，构成一个稍微扭曲的二尖瓣六边形棱镜。这些多面体通过边缘共享与其他两个这种类型的多面体相连，沿着[001]形成链。链通过六重配位的Ag〜+阳离子（d（Ag-O）= 238-246 pm）相互连接，排列方式是使它们连接两个铯多面体的三个氧原子，从而形成二维层平行于（001）平面展开。与两种晶体学上不同的四面体含氧锰酸（VII）阴离子[MnO _4]-（d（Mn-O）= 161-162 pm），另一种铯阳离子（（CN = 13的（Cs2）〜+）最后连接这些三维三维图层。

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