波谱学杂志 ›› 1997, Vol. 14 ›› Issue (3): 241-244.

• 研究论文 • 上一篇    下一篇

高岭土与针铁矿胶结样中27Al、29Si NMR谱与其原子电荷关系

李锦恩1, 程昌炳2, 陈琼1, 周良忠3   

  1. 1 武汉大学化学系, 武汉 430072;
    2 中国科学院武汉岩土力学研究所, 武汉 430071;
    3 中国人民解放军后勤工程学院, 重庆 630042
  • 收稿日期:1996-12-19 修回日期:1997-02-17 出版日期:1997-06-05 发布日期:2018-01-22
  • 作者简介:李锦恩,男,31岁,在读硕士
  • 基金资助:
    国家自然科学基金资助项目(批准号19372075)

THE RELATION BETWEEN THE 27Al、29Si NMR SPECTRA OF THE ARTIFICIALLY-CEMENTED SPECIMEN OF KAOLINITE WITH GOETHITE AND THEIR ATOMIC CHARGE

Li Jin'en1, Cheng Changbin2, Chen Qiong1, Zhou Liangzhong3   

  1. 1 Department of Chemistry, Wuhan University, Wuhan 430072;
    2 Wuhan Institute of Rock and Soil Mechanics, The Chinese Academy of Sciences, Wuhan 430071;
    3 Logistic Engineering College, Chongqing 630042
  • Received:1996-12-19 Revised:1997-02-17 Online:1997-06-05 Published:2018-01-22

摘要: 由NMR谱实验得高岭土与针铁矿胶结样中27Al、29Si的化学位移较单一高岭土分别正移了2.7ppm和2.33ppm.由CNDO/2方法计算得到胶结样中Al、Si原子电行比高岭土分别减少了0.0787和0.0286.胶结样中Al、Si原子电荷的减少与27Al、29Si NMR谱化学位移相吻合,可以认为在高岭土与外铁矿的界面上形成了氢键而呈现胶结态.

关键词: 高岭土, 针铁矿, 胶结作用, NMR谱, 原子电荷

Abstract: The 27Al、29Si chemical shifts in the artificially-cemented specimens of kaolinite with goethite are, according to the NMR experiments, greater than those in pure kaolinite respectively by 2.7ppm and 2.33ppm. The atomic charges in the same artificially-cemented specimens are, on the basis of the computation results of CNDO/2 method, less than those in pure kaolinite respectively by 0.0787 and 0.0286. The changes of the atomic charges agree with those of 27Al、29Si chemical shifts. It has been considered that there are hydrogen bonds between kaolinite and geothite and they are in cemented state.

Key words: Kaolinite, Goethite, Cementation, NMR spectrum, Atomic charge