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Behavior of catapleiite under heating and crystal structure of its high-temperature transformation product, a new phase Na6Zr3[Si9O27] with nine-membered rings of SiO4 tetrahedraстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 марта 2020 г.
- Авторы: Ksenofontov D.A., Grebenev V.V., Zubkova N.V., Pekov I.V., Kabalov Yu K., Chukanov N.V., Pushcharovsky D.Yu, Artamonova A.A.
- Журнал: Geology of Ore Deposits
- Том: 61
- Номер: 7
- Год издания: 2019
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 696
- Последняя страница: 705
- DOI: 10.1134/S1075701519070080
- Аннотация: Thermal behavior of catapleiite, ideally Na2ZrSi3O9 ⋅ 2H2O, has been investigated with the X-ray diffraction, electroconductivity measurements using impedance spectroscopy, dynamic scanning calorimetry, thermal gravimetry, and infrared spectroscopy. The high-temperature transformation product of catapleiite obtained after annealing of catapleiite at 1000°C has been studied. This is a new microporous zirconosilicate, ideally Na6Zr3[Si9O27], representing a new structural type. It is hexagonal, P63/mcm, a = 11.5901(9), c = 9.9546(9) Å, V = 1158.05(16) Å3. Its crystal structure model has been obtained using single-crystal X-ray diffraction data and refined by the Rietveld method on the basis of the powder X-ray diffraction data (R = 3.87%). The structure is based on the heteropolyhedral framework, which substantially differs from that of catapleiite and is built by nine-member rings Si9O27 formed by SiO4 tetrahedra linked with isolated ZrO6 octahedra. Extraframework Na cations are located in broad channels of the framework and between the tetrahedral Si9O27 rings.
- Добавил в систему: Ксенофонтов Дмитрий Александрович