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应用科学学报 ›› 1986, Vol. 4 ›› Issue (3): 213-218.

• 论文 • 上一篇    下一篇

X射线粉末衍射法对不同含水量NaY分子筛结构的探讨

俞印亮, 郑培菊, 许自省, 陈民勤, 王博义   

  1. 复旦大学
  • 收稿日期:1983-07-11 修回日期:1984-01-16 出版日期:1986-09-30 发布日期:1986-09-30

STUDYING THE STRUCTURE OF NaY ZEOLITE WITH VARYING DEHYDRATION LEVEL USING X-RAY POWDER DIFFRACTION

YU YINLIANG, ZHENG PCIU, XU ZISHENG, CHENG MINGQIN, WANG BOY   

  1. Fudan University
  • Received:1983-07-11 Revised:1984-01-16 Online:1986-09-30 Published:1986-09-30

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摘要： 对不同含水量的样品,用12kW高功率转靶X射线粉末衍射仪阶梯扫描,收集S(H2+K2+L2) ≤ 384的全部衍射线强度.以傅立叶和差值傅立叶电子密度函数法测定各样品骨架原子、钠离子、水的位置和占有率粗值,再用最小二乘法修正全部结构参数,使R值在0.16以下.由坐标参数计算了晶胞中各离子、原子间的键长数值.

Abstract: The four samples with varying water content were kept in double layer plastic bag. The intensity data up toS (H2+K2+L2)=384 were collected on a 12kW powerful rotating anode X-Ray diffraotometer in step scan mode. The coordinates and occupancy factors of sodium ions and water molecules were determined by F0 and △F syntheses. The structure was refined by least-square method. The values of R were below 0.16. The bond lengths and bond angles derived from coordinates fell in normal ranges.
This study has shown the following results. On removal of water molecules, sodium ions in superoages migrate toward β cages and hexagonal prisms. In addition, sodium-water interactions decrease and sodium-oxygen interactions increase in dehydration process.