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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >The transition from isolated dimeric [AlF4/1F2/2](2) groups of edge-sharing octahedra to infinitive linear chains (1)(infinity)[AlF4/1F2/2] of corner-sharing octahedra within the tetragonal compounds (Sr, M)AlF5 (M = Ca, Ba) - the influence of the di
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The transition from isolated dimeric [AlF4/1F2/2](2) groups of edge-sharing octahedra to infinitive linear chains (1)(infinity)[AlF4/1F2/2] of corner-sharing octahedra within the tetragonal compounds (Sr, M)AlF5 (M = Ca, Ba) - the influence of the di

机译：在四边形化合物中从孤立的二分体八面体的二聚体[AlF4 / 1F2 / 2]（2）组过渡到四面体的角共享八面体的不定线性链（1）（无穷大）[AlF4 / 1F2 / 2] M）AlF5（M = Ca，Ba）-di的影响

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The solid solutions Sr0.87(1)Ba0.13(1)AlF5, Sr0.75(1)Ba0.25(1)AlF5, Sr0.24(1)Ba0.76(1)AlF5 and Ca0.13(3)Sr0.56(6)Ba0.31(3)AlF5 have been prepared by solid state reactions from the binary fluorides. The crystal structures have been determined by means of single crystal diffraction data. All compounds crystallize tetragonal body-centered in different structure types which are composed of two main structural building blocks. The first building block is common to all solid solutions and consists of linear chains of trans corner-sharing [AlF6] octahedra propagating along the c axis. Two opposite equatorial fluorine atoms of this chain have been replaced by other [AlF6] octahedra thus forming branching chains which give rise to a tunnel arrangement. The alkaline earth metal atoms are located inside the tunnels and those structural motifs extend parallel the tunnel axis which lead to the formation of the different structure types. By increasing the Ba content of the solid solutions a transition from isolated dimeric groups [AlF4/1F2/2](2) of edge-sharing octahedra, and by additional incorporation of Ca from disordered zigzag chains, to linear infinitive (1)(proportional to)[AlF4/1F2/2] chains of corner-sharing octahedra has been established. [References: 25]
机译：固溶体Sr0.87（1）Ba0.13（1）AlF5，Sr0.75（1）Ba0.25（1）AlF5，Sr0.24（1）Ba0.76（1）AlF5和Ca0.13（3 Sr0.56（6）Ba0.31（3）AlF5已通过固态反应从二元氟化物制备。晶体结构已经通过单晶衍射数据确定。所有化合物都以不同结构类型为中心，以四方体的形式结晶，该结构类型由两个主要结构组成部分组成。第一个构造块对所有固溶体都是共有的，由沿c轴传播的跨角共享[AlF6]八面体的线性链组成。该链的两个相对的赤道氟原子已被其他[AlF6]八面体所取代，从而形成了支链，从而形成了隧道排列。碱土金属原子位于隧道内部，那些结构基序平行于隧道轴线延伸，这导致形成不同的结构类型。通过增加固溶体中的Ba含量，可以从边缘共享八面体的孤立二聚体[AlF4 / 1F2 / 2]（2）过渡到无定形之字形链中的Ca，再过渡到线性不定式（1）（比例至）已建立角共享八面体的[AlF4 / 1F2 / 2]链。 [参考：25]

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