Issue 39, 2015

Synthesis and structural characterization of AMV2O8 (A = K, Rb, Tl, Cs; M = Nb, Ta) vanadates: a structural comparison of A+M5+V2O8 vanadates and A+M5+P2O8 phosphates

Abstract

Eight new quaternary vanadates of niobium and tantalum, AMV2O8 (A = K, Rb, Tl, Cs; M = Nb, Ta), have been prepared by solid state reactions and structurally characterized by single crystal and powder X-ray diffraction (XRD) techniques. The two cesium compounds, unlike the known CsSbV2O8 with a layered yavapaiite structure, have a new three-dimensional structure and the other six compounds possess the known KSbV2O8 structure type. The three types of [(MV2O8)] anionic frameworks of twelve A+M5+V2O8 (A = K, Rb, Tl, Cs; M = Nb, Ta, Sb) vanadates could be conceived to be built by different connectivity patterns of M2V4O18 ribbons, which contain MO6 octahedra and VO4 tetrahedra. A structural comparison of these twelve vanadates and the nineteen A+M5+P2O8 phosphates has been made. The spectroscopic studies of these eight new quaternary vanadates are presented.

Graphical abstract: Synthesis and structural characterization of AMV2O8 (A = K, Rb, Tl, Cs; M = Nb, Ta) vanadates: a structural comparison of A+M5+V2O8 vanadates and A+M5+P2O8 phosphates

Supplementary files

Article information

Article type
Paper
Submitted
10 Jul 2015
Accepted
24 Aug 2015
First published
21 Sep 2015

Dalton Trans., 2015,44, 17399-17408

Synthesis and structural characterization of AMV2O8 (A = K, Rb, Tl, Cs; M = Nb, Ta) vanadates: a structural comparison of A+M5+V2O8 vanadates and A+M5+P2O8 phosphates

A. K. Paidi, R. N. Devi and K. Vidyasagar, Dalton Trans., 2015, 44, 17399 DOI: 10.1039/C5DT02618K

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