| Инд. авторы: | Seryotkin Y.V., Likhacheva A.Y., Rashchenko S.V. |
| Заглавие: | Structural evolution of Li-exchaned natrolite at pressure-induced over-hydration: An X-ray diffraction study |
| Библ. ссылка: | Seryotkin Y.V., Likhacheva A.Y., Rashchenko S.V. Structural evolution of Li-exchaned natrolite at pressure-induced over-hydration: An X-ray diffraction study // Journal of Structural Chemistry. - 2016. - Vol.57. - Iss. 7. - P.1377-1385. - ISSN 0022-4766. - EISSN 1573-8779. |
| Внешние системы: | DOI: 10.1134/S0022476616070118; SCOPUS: 2-s2.0-85009998097; WoS: 000392616400011; |
| Реферат: | eng: The behavior of Li-exchanged natrolite Li1.92Na0.10[Al2.02Si2.98O10]∙2H2O at compression in penetrating (water-containing) medium was studied by in situ synchrotron powder diffraction in diamond anvil cell up to 2.5 GPa. Within 0-1.3 GPa the compression is almost isotropic, and upon the further pressure increase the sample undergoes additional hydration, leading to abrupt volume expansion by 22%, a record value for natrolite. In the proposed model for the high-pressure phase Li2[Al2Si3O10]∙6H2O the Li+ cations have no contact with the framework O-atoms and are surrounded by “water-jacket” in the form of semi-octahedron (tetragonal pyramid) composed of five H2O molecules. Such polyhedra, lining up along the channel axis, are joined through their edges and create a “water” column expanding the structure. © 2017, Pleiades Publishing, Ltd.
|
| Ключевые слова: | zeolites; over-hydration; Li-natrolite; high pressure; |
| Издано: | 2016 |
| Физ. характеристика: | с.1377-1385 |