IR Spectroscopic Characterization of NH4-Analcime Научная публикация
Журнал |
Physics and Chemistry of Minerals
ISSN: 0342-1791 , E-ISSN: 1432-2021 |
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Вых. Данные | Год: 2002, Том: 29, Номер: 9, Страницы: 617-623 Страниц : 7 DOI: 10.1007/s00269-002-0272-4 | ||||
Ключевые слова | Ammonium, Analcime, IR spectroscopy | ||||
Авторы |
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Организации |
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Информация о финансировании (3)
1 | Российский фонд фундаментальных исследований | 01-05-65414 |
2 | Российский фонд фундаментальных исследований | 00-05-65305 |
3 | Российский фонд фундаментальных исследований | 02-05-65313 |
Реферат:
The IR spectrum of ammonium-exchanged natural analcime (basalt, Nidym River, Siberian platform) exhibits several features that suggest a lowered symmetry for the NH4+ ion and that this is influenced by hydrogen bonding within the framework. These features are: the pronounced splitting into three components and high-frequency shift of the ν4-bending mode; appearance of the ν1-stretching mode which is predicted to become IR-active when the ideal Td symmetry of NH4+ ion is violated, and the low-frequency shift of the ν1- and ν3-stretching modes. The absence of absorption lines in the 1800–2400-cm−1 region indicates that hydrogen bonding between the framework and the NH+4 ion is very weak. The three-component splitting of the ν4-bending mode indicates that the symmetry of NH+4 ion is lower than C3v. This implies that at least two N–H bonds of the NH+4 ion are disturbed by hydrogen bonding. Computer analysis of the normal vibrations of the NH+4 molecule for different symmetry types (using harmonic approximation) indicates that the best fit to the observed ν4 triplet frequencies for C1 symmetry implies a deviation of the valent angle ∠H–N–H from ideal Td symmetry of around ±2.5°. The factors governing the behaviour of the NH+4 ion in the analcime structure are discussed. The geometry of the nearest environment of the NH+4 ion in the analcime structure is analyzed with respect to the present IR data.
Библиографическая ссылка:
Likhacheva A.Y.
, Paukshtis E.A.
, Seryotkin Y.V.
, Shulgenko S.G.
IR Spectroscopic Characterization of NH4-Analcime
Physics and Chemistry of Minerals. 2002. V.29. N9. P.617-623. DOI: 10.1007/s00269-002-0272-4 WOS Scopus РИНЦ
IR Spectroscopic Characterization of NH4-Analcime
Physics and Chemistry of Minerals. 2002. V.29. N9. P.617-623. DOI: 10.1007/s00269-002-0272-4 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 2 янв. 2002 г. |
Принята к публикации: | 26 июн. 2002 г. |
Опубликована в печати: | 1 окт. 2002 г. |
Идентификаторы БД:
Web of science | WOS:000179422400005 |
Scopus | 2-s2.0-0036805911 |
РИНЦ | 13416014 |
Chemical Abstracts | 2002:788000 |
OpenAlex | W2140255111 |