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Litharge-derived compounds structurally based on layers of Cl− and Br−-centered tetrahedra: Synthesis and structures of the new representatives of MX(ReO4) family (M=Ba, Pb; X=Cl, Br)
Solid State Sciences ( IF 3.5 ) Pub Date : 2021-03-02 , DOI: 10.1016/j.solidstatesciences.2021.106576
Dmitri O. Charkin , Oleg I. Siidra , Igor V. Plokhikh , Artem S. Borisov , Mishel R. Markovski

Two new layered barium perrhenate halides, BaX(ReO4) (X = Cl and Br), were prepared and their structures were refined from single-crystal and powder data, respectively. Both compounds are isostructural to the previously reported BaCl(MnO4), exhibiting a matlockite (PbFCl)-derived motif. The structure of previously reported PbBr(ReO4) was also refined, in order to obtain a complete data set; it is similar to PbCl(ReO4). The structures of Ba and Pb compounds correspond to the centro- and non-centrosymmetric versions (pseudo-polymorphs) of the same motif corresponding to the alternation of [M2X2]2+ litharge-derived slabs and double sheets of perrhenate anions. Strong relationships exist to the structures of LnX(TO4) (X = Cl, Br; T = Mo, W) which are monoclinically distorted versions of the orthorhombic permanganates and perrhenates. Crystal chemistry and further perspectives of the compounds with litharge slabs constructed of Cl, Br, and I-centered tetrahedra are discussed.



中文翻译:

密陀僧衍生的结构以Cl为基准的层的化合物-和Br - -centered四面体:合成与所述新的代表结构MX(REO 4)家族(中号=钡,铅; X =氯,溴)

制备了两种新的层状高r酸钡卤化物Ba X(ReO 4)(X  = Cl和Br),并分别从单晶和粉末数据中精炼了它们的结构。两种化合物都与先前报道的BaCl(MnO 4)具有同构结构,表现出由菱锰矿(PbFCl)衍生的基序。为了获得完整的数据集,还对先前报道的PbBr(ReO 4)的结构进行了改进。它类似于PbCl(ReO 4)。Ba和Pb化合物的结构对应于同一主题的中心和非中心对称形式(伪多晶型物),对应于[ M 2 X 2 ] 2+的交替源自立陶宛的平板和双层高ate酸根阴离子。Ln XT O 4)(X  = Cl,Br; T  = Mo,W)的结构具有很强的关系,它们是正交晶体的高锰酸盐和高r酸盐的单临床畸变形式。讨论了晶体化学以及具有由Cl,Br和I中心的四面体构成的轻晶平板的化合物的进一步观点。

更新日期:2021-03-07
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