Simultaneous presence of (Si₃O₁₀)^8- and (Si₂O₇)^6- groups in new synthetic mixed sorosilicates

Author(s)

Maria Wierzbicka-Wieczorek, Daniel M. Többens, U. Kolitsch, E. Tillmanns

Abstract

Three new, isotypic silicate compounds, BaY(Si O)(SiO), SrYb (SiO)(SiO) and SrSc(SiO)(SiO), were synthesized using high-temperature flux growth techniques, and their crystal structures were solved from single-crystal X-ray intensity data: monoclinic, P2/m, with a=5.532(1)/5.469(1)/5.278(1), b=19.734(4)/19.447(4)/19.221(4), c=6.868(1)/6.785(1)/6.562(1) Å, β=106.53(3)/106.20(3)/106.50(3), V=718.8(2)/693.0(2)/638.3(2) Å, R(F)=0.0225/0.0204/0.0270, respectively. The topology of the novel structure type contains isolated horseshoe-shaped SiO groups (Si-Si-Si=93.15-95.98), SiO groups (Si-O-Si=180, symmetry-restricted) and edge-sharing M(1)O and M(2)O octahedra. Single-crystal Raman spectra of the title compounds were measured and compared with Raman spectroscopic data of chemically and topologically related disilicates and trisilicates, including BaY(SiO) and SrY(Si O). The band assignments are supported by additional theoretical calculation of Raman vibrations by DFT methods.

Organisation(s)

Department of Mineralogy and Crystallography

External organisation(s)

Friedrich-Schiller-Universität Jena, Helmholtz-Zentrum Berlin für Materialien und Energie, Naturhistorisches Museum Wien (NHM)

Journal

Journal of Solid State Chemistry

Volume

207

Pages

94-104

No. of pages

11

ISSN

0022-4596

DOI

https://doi.org/10.1016/j.jssc.2013.09.007

Publication date

01-2013

Peer reviewed

Yes

Austrian Fields of Science 2012

104003 Inorganic chemistry, 105113 Crystallography

Portal url

https://ucrisportal.univie.ac.at/en/publications/ab5c1e44-b4c6-4f4e-b676-d5ed08f4c6b9