Author:
Sonni Manel,Marzouki Riadh,Zid Mohamed Faouzi,Souilem Amira
Abstract
The title compound, nonasodium chromium(III) hexakis[molybdate(VI)], β-Na9CrMo6O24, was prepared by solid-state reactions. This alluaudite-type structure is constituted of infinite layers formed by links betweenM2O10(M= C/Na) dimers and MoO4tetrahedra. The Na+and Cr3+cations are located in the same site with, respectively, 0.25 and 0.75 occupancies. The layers are connected to each other through MoO4sharing corners, resulting an in open three-dimensional framework with hexagonal-form cavities occupied by Na+cations. The proposed structural model is supported by charge-distribution (CHARDI) and bond-valence-sum (BVS) analysis. All atoms are on general positions except for one Mo, two Na (site symmetry 2) and another Na site (site symmetry -1). A comparison is made with the similar structures Na4Co(MoO4)3, Na2Ni(MoO4)2, Cu1.35Fe3(PO4)3and NaAgFeMn2(PO4)3.
Publisher
International Union of Crystallography (IUCr)
Subject
Condensed Matter Physics,General Materials Science,General Chemistry
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