Triple-quantum Al-27 and Na-23 MAS NMR study of amphiboles

被引:5
作者
Delevoye, L
Liu, SX
Welch, MD
Fernandez, C
Amoureux, JP
Klinowski, J
机构
[1] UNIV CAMBRIDGE, DEPT CHEM, CAMBRIDGE CB2 1EW, ENGLAND
[2] NAT HIST MUSEUM, DEPT MINERAL, LONDON SW7 5BD, ENGLAND
[3] UNIV SCI & TECHNOL LILLE, LAB DYNAM & STRUCT MAT MOL, CNRS, URA 801, F-59830 VILLENEUVE DASCQ, FRANCE
来源
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1997年 / 93卷 / 15期
关键词
D O I
10.1039/a701848g
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Triple-quantum magic-angle spinning (MAS) enhances the resolution of Al-27 and Na-23 NMR spectra of amphiboles, although the structural complexity of these compact materials can limit the efficiency of the method in comparison with its performance with molecular sieves. Two aluminium environments are resolved in fluor-edenite, unequivocally demonstrating the presence of some long-range Si-Al disorder. Na-23 multi-quantum (MQ)-MAS of hydro-sodian-magnesiocummingtonite (HSMC) at two temperatures demonstrates that a phase transition affects mainly site A. MQ-MAS allows the direct determination of the number of distinct sites with their quadrupolar parameters and isotropic chemical shifts. The technique is very useful for the simulation of MAS spectra.
引用
收藏
页码:2591 / 2595
页数:5
相关论文
共 26 条
  • [1] Z filtering in MQMAS NMR
    Amoureux, JP
    Fernandez, C
    Steuernagel, S
    [J]. JOURNAL OF MAGNETIC RESONANCE SERIES A, 1996, 123 (01) : 116 - 118
  • [2] HIGH-RESOLUTION SOLID-STATE NMR FOR SPIN 3/2 AND 9/2 - THE MULTIQUANTUM TRANSITIONS METHOD
    AMOUREUX, JP
    [J]. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 1993, 2 (1-2) : 83 - 88
  • [3] AMOUREUX JP, UNPUB J CHEM PHYS
  • [4] BOSCHMANN KF, 1994, CAN MINERAL, V32, P21
  • [5] CAMERON M, 1983, AM MINERAL, V68, P924
  • [6] Engelhardt G., 1987, HIGH RESOLUTION SOLI
  • [7] Al-27 MAS NMR characterization of AlPO4-14 enhanced resolution and information by MQMAS
    Fernandez, C
    Amoureux, JP
    Chezeau, JM
    Delmotte, L
    Kessler, H
    [J]. MICROPOROUS MATERIALS, 1996, 6 (5-6): : 331 - 340
  • [8] Crystallographic site probing in the triclinic CHA-like AlPO4 by Al-27 2D quintuple-quantum NMR
    Fernandez, C
    Amoureux, JP
    Delmotte, L
    Kessler, H
    [J]. MICROPOROUS MATERIALS, 1996, 6 (03): : 125 - 130
  • [9] Triple-quantum MAS-NMR of quadrupolar nuclei
    Fernandez, C
    Amoureux, JP
    [J]. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 1996, 5 (04) : 315 - 321
  • [10] FERNANDEZ C, 1996, ACS ABS, V212