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

Chinese Journal of Magnetic Resonance ›› 1997, Vol. 14 ›› Issue (3): 241-244.

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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 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 Published:1997-06-05 Online:2018-01-22

Abstract

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

Li Jin'en, Cheng Changbin, Chen Qiong, Zhou Liangzhong. THE RELATION BETWEEN THE ²⁷Al、²⁹Si NMR SPECTRA OF THE ARTIFICIALLY-CEMENTED SPECIMEN OF KAOLINITE WITH GOETHITE AND THEIR ATOMIC CHARGE[J]. Chinese Journal of Magnetic Resonance, 1997, 14(3): 241-244.

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

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