Structure and Brønsted acid sites of ferrierite

✍ Scribed by Yoshinobu Yokomori; Jørgen Wachsmuth; Koji Nishi

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 142 KB
• Volume: 50
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(01)00438-3

✦ Synopsis

The structure of natural ferrierite (from Kamloops Lake) is determined. The space group is not Immm but I222 (no. 23) and its R-factor is 8.6%. All 18 H 2 O molecules, Na þ , and Mg 2þ ions are successfully assigned [Mg 1:6 (Ca 0:1 Ba 0:1 Na 1:6 K 0:4 )Al 5:8 Si 30:2 O 72 Á 18H 2 O]. The angle of T(41)-O(5)-T( 42) is 168°because the O5 site is not located on an inversion center in I222 space group. We also determined Brønsted acid sites. The Al atom distribution in the framework is also discussed and the T(1), T(2), and T(42) [or T(41)]-sites are the most probable sites. Ó 2001 Published by Elsevier Science B.V.