The diphyllosilicate Rb2(VO)2[Si8O19]

Dirubidium divanadyl phyllooctasilicate, Rb2(VO)2[Si8O19], is the first known anhydrous diphyllosilicate containing VIV. The structure consists of silicate double layers which are separated by [V2O8]8− dimers and is related to that of the compounds A2Cu2[Si8O19] (A = Rb or Cs), although the title co...

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Bibliographic Details
Published in:Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2008-03, Vol.64 (3), p.i27-i29
Main Authors: Prinz, Sebastian, Sparta, Karine M., Roth, Georg
Format: Article
Language:English
Subjects:
Chemical compounds
Crystal structure
Crystallography
Silica
Online Access:Get full text
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Summary:Dirubidium divanadyl phyllooctasilicate, Rb2(VO)2[Si8O19], is the first known anhydrous diphyllosilicate containing VIV. The structure consists of silicate double layers which are separated by [V2O8]8− dimers and is related to that of the compounds A2Cu2[Si8O19] (A = Rb or Cs), although the title compound crystallizes in a noncentrosymmetric orthorhombic space group. The silicate double layers contain four tetrahedrally coordinated Si sites in general positions and 12 O sites, nine in general positions and the other three on mirror planes. The vanadyl dimers have two square‐pyramidally coordinated V sites (site symmetry m). There are two different 10‐ and 12‐fold coordinated Rb sites with site symmetry m, one of which is a split position located between the dimers in the interlayer space, while the other is in a channel within the silicate layer.
ISSN:0108-2701
1600-5759
DOI:10.1107/S0108270107068205