Crystal structures of K-and Cs-exchanged forms of zorite |
| |
| Authors: | N V Zubkova D Yu Pushcharovsky G Giester I V Pekov A G Turchkova N V Chukanov E Tillmanns |
| |
| Institution: | (1) Faculty of Geology, Moscow State University, Vorob’evy gory, Moscow, 119992, Russia;(2) Institute of Mineralogy and Crystallography, Geocenter, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria;(3) Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia |
| |
| Abstract: | The crystal structures of K-and Cs-exchanged forms of zorite were studied by X-ray diffraction and IR spectroscopy: K4.75Na1.82Ti(Ti0.79Nb0.20)4Si12O34(O,OH)5.2] × 10.62 H2O (sp. gr. Cmmm, R= 0.0481 for 516 independent reflections) and Cs4.34Na1.90Ti(Ti0.80Nb0.18)4Si12O34(O,OH)5] × 5.37 H2O (sp. gr. Cmmm, R = 0.0285 for 621 independent reflections). Both structures retain the mixed polyhedral framework of zorite: Na6Ti(Ti,Nb)4(Si6O17)2(O,OH)5 × nH2O, where n ～ 11. It is shown that the positions of the atoms located in the cavities of the frameworks of these compounds differ from those in the structures of zorite and its synthetic analogs. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
