Revisiting the structure of the germanate zeotype ASU-7 (ASV)

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• 作者：Martin P. Attfield ; Faisal Al-Otaibi ; Yousef Al-Ebini
• 关键词：Germanate ; ASU-7 ; Crystal structure ; Zeotype ; Ordered framework
• 刊名：Microporous and Mesoporous Materials
• 出版年：2009
• 出版时间：1 February 2009
• 年：2009
• 卷：118
• 期：1-3
• 页码：508-512
• 全文大小：379 K

文摘

The structure of the germanate zeotype material ASU-7 has been redetermined (tetragonal, space group P4/mnc, a = 12.4222(5) Å c = 14.4815(3) Å, V = 2234.66(14) Åp>3p>, R₁ = 0.0289 and wR₂ = 0.0762 for 867 (I > 2σ(I)) reflections) and shown to possess an ordered framework with a regular arrangement of the constituent double four ring units. The regular arrangement of the constituent rectangular prism-shaped double four ring units results in two, subtly different, 12-membered rings channels being defined along the crystallographic c-axis.