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Author Seo, Sung Man ♦ Kim, Ghyung Hwa ♦ Lee, Heung Soo ♦ Ko, Seong-Oon ♦ Lee, Oh Seuk ♦ Kim, Young Hun ♦ Kim, Seok Han ♦ Heo, Nam Ho ♦ Lim, Woo Taik
Source J-STAGE
Content type Text
Publisher The Japan Society for Analytical Chemistry
Language English
Abstract The crystal structure of $¦Na_{71}¦[Si_{121}Al_{71}O_{384}]-FAU,$ a = 24.946(3)Å, dehydrated at 673 K and 1 × $10^{-6}$ Torr, was determined by single-crystal X-ray diffraction techniques in the cubic space group Fd3m at 294 K. About 71 $Na^{+}$ ions per unit cell are found at an unusually large number of crystallographically distinct positions, seven. Five $Na^{+}$ ions are at the centers of double 6-rings (D6Rs, site I). Two site-I′ positions (in the sodalite cavities opposite D6Rs) are occupied by eight and fourteen $Na^{+}$ ions, respectively, per unit cell. Thirteen and fifteen $Na^{+}$ ions per unit cell are found at two site-II positions, in the supercages opposite S6Rs. The remaining twelve and four $Na^{+}$ ions occupy two sites III′ near triple 4-rings in the supercage.
Learning Resource Type Article
Publisher Date 2006-01-01
e-ISSN 13482238
Journal Analytical Sciences: X-ray Structure Analysis Online(analscix)
Volume Number 22


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