Elaboration, etude structurale et analyse CHARDI et BVS d'une nouvelle variete β-Na9Cr(MoO4)6 de type alluaudite.

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 between M 2O10 (M = C/Na) dimers and MoO4 tetra-hedra. The Na(+) and Cr(3+) cations are located in the same site with, respectively, 0.25 and 0.75 occupancies. The layers are connected to each other through MoO4 sharing corners, resulting an in open three-dimensional framework with hexa-gonal-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

SUBMITTER: Sonni M 

PROVIDER: S-EPMC4908561 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature