Crystal structure of Pb-exchanged form of zorite
- Author(s)
- Natalia V Zubkova, Dmitry Y. Pushcharovsky, Gerald Giester, Igor V Pekov, Anna G. Turchkova, Ekkehart Tillmanns, N V Chukanov
- Abstract
The crystal structure of a Pb-exchanged form of zorite is studied by X-ray diffraction: Pb3.95(Ca0.1Sr0.05)[Ti(Ti 0.80Nb0.20)4Si12O38(OH)] • 9.52H2O (sp. gr. Cmmm, R = 0.0530 for 680 independent reflections). The structure retains the mixed polyhedral framework of zorite, Na6[Ti(Ti,Nb)4(Si6O17) 2(O,OH)5] • 11H2O. This framework is composed of xonotlite-like [Si6O17] ribbons linked to each other by columns of vertex-sharing (Ti,Nb)O6 octahedra and isolated TiO5 half-octahedra. Lead atoms in the Pb-exchanged form occupy one site, unlike Cs cations in the Cs-exchanged form of zorite, which are strongly disordered and partially occupy eight positions. The position of Pb2+ cations corresponds to the Na(2) position in the zorite structure, the Sr position in the Sr-exchanged form of ETS-4, and the K position in the K-exchanged form and is similar to the position of the water molecule W(3) in the structure of the Cs-exchanged form of zorite. Œ Nauka/Interperiodica 2006.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- Anuchin Research Institute and Museum of Anthropology, Russian Academy of Sciences
- Journal
- Crystallography Reports
- Volume
- 51
- Pages
- 379-382
- No. of pages
- 4
- ISSN
- 1063-7745
- Publication date
- 2006
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105113 Crystallography
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/9e120143-55a1-4ccd-8d62-04bdba85bd6d