Crystal structure of disilver(I) dizinc(II) iron(III) tris(orthovanadate) with an alluaudite-type structure

Acta Crystallographica Section E: Crystallographic Communications

Nour El Houda Lamsakhar¹  Mohammed Zriouil¹  Mohamed Saadi¹  Lahcen El Ammari¹  Abderrazzak Assani¹ 

[1] 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;

关键词: crystal structure;    transition metal vanadate;    solid-state reaction;    alluaudite structure type.;    crystal structure;   

DOI  :  10.1107/S205698901801071X

来源: DOAJ

【 摘 要 】

The title compound, Ag2Zn2Fe(VO4)3, 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 4b), and an additional silver site, as well as one zinc and one vanadium site, on twofold rotation axes (4e). One site on a general position is statistically occupied by FeIII and ZnII cations that are octahedrally surrounded by O atoms. The three-dimensional framework structure of the title vanadate results from [(Zn,Fe)2O10] units of edge-sharing [(Zn,Fe)O6] octahedra that alternate with [ZnO6] octahedra so as to form infinite chains parallel to [10\overline{1}]. These chains are linked through VO4 tetrahedra by sharing vertices, giving rise to layers extending parallel to (010). Such layers are shared by common vanadate tetrahedra. 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.

【 授权许可】

Unknown