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

Autor(en)

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

Abstrakt

Three new, isotypic silicate compds., BaY4(Si2O7)​(Si3O10)​, SrYb4(Si2O7)​(Si3O10) and SrSc4(Si2O7)​(Si3O10)​, were synthesized using high-​temp. flux growth techniques, and their crystal structures were solved from single-​crystal X-​ray intensity data: monoclinic, P21/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) Å3, R(F)​=0.0225​/0.0204​/0.0270, resp. The topol. of the novel structure type contains isolated horseshoe-​shaped Si3O10 groups (Si-​Si-​Si=93.15-​95.98!!!)​, Si2O7 groups (Si-​Obridge-​Si=180°, symmetry-​restricted) and edge-​sharing M(1)​O6 and M(2)​O6 octahedra. Single-​crystal Raman spectra of the title compds. were measured and compared with Raman spectroscopic data of chem. and topol. related disilicates and trisilicates, including BaY2(Si3O10) and SrY2(Si3O10)​. The band assignments are supported by addnl. theor. calcn. of Raman vibrations by DFT methods.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

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

Journal

Journal of Solid State Chemistry

Band

207

Seiten

94-104

Anzahl der Seiten

11

ISSN

0022-4596

DOI

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

Publikationsdatum

01-2013

Peer-reviewed

Ja

ÖFOS 2012

104003 Anorganische Chemie, 105113 Kristallographie

Link zum Portal

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