Hydrothermal Synthesis, Crystal Structure, and Solid-State NMR Spectroscopy of a New Indium Silicate: K2In(OH)(Si4O10)

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• 作者：Ling-I Hung ; Sue-Lein Wang ; Hsien-Ming Kao ; and Kwang-Hwa Lii
• 刊名：Inorganic Chemistry
• 出版年：2003
• 出版时间：June 30, 2003
• 年：2003
• 卷：42
• 期：13
• 页码：4057 - 4061
• 全文大小：103K
• 年卷期：v.42,no.13(June 30, 2003)
• ISSN：1520-510X

文摘

A new indium(III) silicate, K₂In(OH)(Si₄O₁₀), has been synthesized by a high-temperature, high-pressure hydrothermalmethod. It crystallizes in the monoclinic space group P2₁/m (No. 11) with a = 11.410(1) Å, b = 8.373(1) Å, c =11.611(1) Å, = 112.201(2), and Z = 4. The structure, which is analogous to that of K₂CuSi₄O₁₀, consists ofunbranched vierer 4-fold chains of corner-sharing SiO₄ tetrahedra running along the b axis linked together viacorner sharing by chains of trans-corner-sharing InO₄(OH)₂ octahedra to form a 3-D framework which delimits8-ring and 6-ring channels to accommodate K⁺ cations. The presence of hydroxyl groups is confirmed by IRspectroscopy. The ²⁹Si MAS NMR exhibits four resonances at -88.6, -90.1, -97.4, and -98.2 ppm correspondingto four distinct crystallographic Si sites. A ¹H ²⁹Si CP/MAS NMR experiment was performed to assign the fourresonances.