Novel synthetic alkali-yttrium silicates with a new microporous mixed framework topology: (Rb,Cs)9Y7Si24O63 and isotypic Rb9Y7Si24O63
- Author(s)
- Maria Wierzbicka-Wieczorek, Uwe Kolitsch, Ekkehart Tillmanns
- Abstract
Prismatic colourless crystals of the two novel, isotypic title compounds were obtained by the flux growth technique. The crystal structures have been determined from single-crystal intensity data in space group R 3 with a = 28.819(4) / 28.799(4), c = 13.916(3) / 13.864(3) Å, V = 10009(3) / 9958(3) Å3, Z = 6, R (F) = 4.99 / 6.44%, respectively. They represent a novel structure type with microporous character. The framework is built from six-membered silicate rings (approximate UDUDUD orientation) containing isolated YO6 octahedra and compressed six-membered rings, which in fact build a spiral of corner-sharing SiO4 tetrahedra. Approximately parallel to [111] run two different irregular channels hosting the Rb/Cs and Rb atoms.
- Organisation(s)
- Department of Mineralogy and Crystallography
- Journal
- Crystal Research and Technology: journal of experimental and industrial crystallography
- Volume
- 43
- Pages
- 1210-1219
- No. of pages
- 10
- ISSN
- 0232-1300
- Publication date
- 2008
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105113 Crystallography
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ce9df8cf-490d-4ddc-adf7-356ab80ab704