Lamsakhar Nour El Houda, Zriouil Mohammed, Assani Abderrazzak, Saadi Mohamed, El Ammari Lahcen
Laboratoire de Chimie Appliquée des Matériaux, Centre des Sciences des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Batouta, BP 1014, Rabat, Morocco.
Acta Crystallogr E Crystallogr Commun. 2018 Jul 27;74(Pt 8):1155-1158. doi: 10.1107/S205698901801071X. eCollection 2018 Aug 1.
The title compound, AgZnFe(VO), has been synthesized by solid-state reactions and belongs to the alluaudite structure family. In the crystal structure, four sites are positioned at special positions. One silver site is located on an inversion centre (Wyckoff position 4), and an additional silver site, as well as one zinc and one vanadium site, on twofold rotation axes (4). One site on a general position is statistically occupied by Fe and Zn cations that are octa-hedrally surrounded by O atoms. The three-dimensional framework structure of the title vanadate results from [(Zn,Fe)O] units of edge-sharing [(Zn,Fe)O] octa-hedra that alternate with [ZnO] octa-hedra so as to form infinite chains parallel to [10]. These chains are linked through VO tetra-hedra by sharing vertices, giving rise to layers extending parallel to (010). Such layers are shared by common vanadate tetra-hedra. The resulting three-dimensional framework delimits two types of channels parallel to [001] in which the silver sites are located with four- and sixfold coordination by oxygen.
标题化合物AgZnFe(VO)通过固相反应合成，属于阿洛石结构家族。在晶体结构中，四个位点位于特殊位置。一个银位点位于对称中心（Wyckoff位置4），另一个银位点以及一个锌位点和一个钒位点位于二重旋转轴上（4）。一个一般位置上的位点由Fe和Zn阳离子统计占据，它们被O原子八面体包围。标题钒酸盐的三维骨架结构由边共享的[(Zn,Fe)O]八面体的[(Zn,Fe)O]单元与[ZnO]八面体交替形成，从而形成平行于[10]的无限链。这些链通过共享顶点的VO四面体相连，形成平行于(010)延伸的层。这样的层由普通的钒酸四面体共享。由此产生的三维骨架界定了两种平行于[001]的通道，银位点位于其中，与氧形成四重和六重配位。
