A MULTINUCLEAR NMR-STUDY OF CLINOCHLORE

被引：0
|
作者：
WELCH, MD [1 ]
BARRAS, J [1 ]
KLINOWSKI, J [1 ]
机构：
[1] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND
来源：
AMERICAN MINERALOGIST | 1995年 / 80卷 / 5-6期
关键词：
D O I：
暂无
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Tetrahedral and octahedral ordering in synthetic clinochlore with compositions (Mg5Al)[Si3Al]O-10(OH)(8) and (Mg4.56Al1.44)[Si2.58Al1.42]O-10(OH)(8) have been studied by Si-29, Al-27, and H-1 MAS NMR spectroscopy. The Si-29 spectra indicate that Al-O-Al avoidance occurs on tetrahedral sites with considerable short-range order in accordance with the Homogeneous Dispersion of Charges (HDC) model of Herrero et al. (1985a), in which charge imbalance within the tetrahedral sheets is minimized. The H-1 MAS NMR spectra indicate that every Al-[6] is surrounded by six Mg octahedra.
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页码：441 / 447
页数：7
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