Chem. J. Chinese Universities ›› 1988, Vol. 9 ›› Issue (9): 926.
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Jiang Dazhen, Lu Huijuan, Tang Fengjie, Jiao Qingzhe, Liu Xiaoxun
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Abstract: X-ray powder diffraction has been applied to study ultrastable fau-jasites prepared by treating HYwith SiCl4 at high temperature. Aplot of the crystal lattice paramer of USYagainst the number of Al atoms per unit cell shows distinct break at crystal lattice parameter near 24.45 to 24.55. Two equations have been got to calculate the SiO2/Al2O3 ratio of USYframework from crystal lattice parameters.The infrared spectrum in the region 400 to 1500cm-1 is a sensitive tool indicating structural features of zeolite frameworks. The plots of several frequencies against -crystal lattice parameters and atoms fraction of Al also show distinct breaks. When a crystal lattice parameter is small than 24.41, bands are split about 460 and 1145cm-1. The peaks tend to be sharp with decrease in crystal lattice parameter.
Key words: Lattice paramater, Silica/Alumina ratio, Framework frequency
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Jiang Dazhen, Lu Huijuan, Tang Fengjie, Jiao Qingzhe, Liu Xiaoxun . Relation of SiO2/Al2O3 Ratio to Crystal Lattice Parameter and Framework Vibration Frequencies[J]. Chem. J. Chinese Universities, 1988, 9(9): 926.
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http://www.cjcu.jlu.edu.cn/EN/Y1988/V9/I9/926
