砷酸盐（HAsO）（=铊镓、铯镓、铯铝）：三种含AsO八面体的新型金属砷酸盐。
As(HAsO) ( = TlGa, CsGa, CsAl): three new metal arsenates containing AsO octa-hedra.
作者信息
Schwendtner Karolina, Kolitsch Uwe
机构信息
Institute for Chemical Technology and Analytics, Division of Structural Chemistry, TU Wien, Getreidemarkt 9/164-SC, 1060 Wien, Austria.
Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria.
出版信息
Acta Crystallogr E Crystallogr Commun. 2018 Jul 27;74(Pt 8):1163-1167. doi: 10.1107/S2056989018010721. eCollection 2018 Aug 1.
The crystal structures of hydro-thermally synthesized ( = 493 K, 7 d) thallium(I) digallium arsenic(V) hexa-kis-[hydrogenarsenate(V)], TlGaAs(HAsO), caes-ium digallium arsenic(V) hexa-kis-[hydrogenarsenate(V)], CsGaAs(HAsO), and caesium dialuminium arsenic(V) hexa-kis-[hydrogenarsenate(V)], CsAlAs(HAsO), were solved by single-crystal X-ray diffraction. The three compounds are isotypic and adopt the structure type of RbAlAs(HAsO) (), which itself represents a modification of the RbFe(HPO) structure type and consists of a tetra-hedral-octa-hedral framework in which the slightly disordered cations are located in channels. The three new compounds contain AsO octa-hedra assuming the topological role of O octa-hedra. The As-O bond lengths are among the shortest As-O bond lengths known so far in AsO octa-hedra.
通过单晶X射线衍射解析了水热合成（= 493 K，7 天）的铊（I）二镓砷（V）六 - [砷酸氢盐（V）]，TlGa₂As₂(HAsO₄)₆、铯二镓砷（V）六 - [砷酸氢盐（V）]，CsGa₂As₂(HAsO₄)₆和铯二铝砷（V）六 - [砷酸氢盐（V）]，CsAl₂As₂(HAsO₄)₆的晶体结构。这三种化合物是同型的，采用RbAl₂As₂(HAsO₄)₆（）的结构类型，其本身代表RbFe₂(HPO₄)₃结构类型的一种变体，由一个四面体 - 八面体框架组成，其中稍有无序的阳离子位于通道中。这三种新化合物包含AsO₄八面体，其承担着O₆八面体的拓扑作用。As - O键长是迄今为止已知的AsO₄八面体中最短的As - O键长之一。
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