| Synthesis and Structure of Large Single Crystal of TPAF-AlPO_4-5 Molecular Sieve |
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| 作者姓名： | Qiu Shilun Pang Wenqin and Xu Ruren |
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| 作者单位： | Institute of Synthetic and Catalytic Chemistry，Jilin University，Changchun |
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| 摘 要： | A large single crystal of TPAF-AlPO4-5 molecular sieve was synthesized by hydrothermal crystallization in the presence of ammonium fluoride. Starting material composition was · 1 P2O5 · 1 Al2O3 · 2. 2 TPAOH · 1. 7 NH4F ·318 H2O. The crystal size has a hexagonal prism with 80μm across and 500μm length.The structure of tetrapropylarnmonium fluoride - aluminium phosphate type-5 was investigated with X-ray diffraction. The unit cell composition is 12AlPO4 · TPAF, space group P6cc (a= 13. 740(5), c= 8. 474(4) A ). Average bond distances are: P-O 1. 564A and Al-O 1. 640A ,which may be due to the partial disorder of the arrangement of P, Al in the framework. The angles of O-T-O and T-O-T (T?P, Al) are 102-116° and 148-176°, respectively. Residue electron density was not well enough defined to give a precise position for tetrapropylammonium fluoride (TPAF). The template agent, TPA cations, situate in the 12-ring channels and F- anions locate in double 4-rings near the 12-ring channels. Fixing atomic
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Synthesis and Structure of Large Single Crystal of TPAF-AlPO_4-5 Molecular Sieve |
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| Qiu Shilun,Pang Wenqin and Xu Ruren.Synthesis and Structure of Large Single Crystal of TPAF-AlPO_4-5 Molecular Sieve[J].Chemical Research in Chinese University,1989(2). |
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| Authors: | Qiu Shilun Pang Wenqin and Xu Ruren |
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| Abstract: | |
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| Keywords: | AlPO_4-5 molecular sieve single crystal |
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