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搜索结果: 1-15 共查到地质学 NMR相关记录39条 . 查询时间(0.316 秒)
运用NMR(CP/MAS+TOSS)方法, 获得了不同类型构造煤的13C NMR高分辨谱. 在此基础上, 进行谱的拟合和峰的解叠, 求出各种碳官能团的相对含量, 并结合Ro, max, XRD和元素分析成果, 进一步研究了不同类型构造煤结构及成分变化的应力效应. 结果表明: Ro, max不仅是反映煤级的重要指标, 而且也是反映构造煤结构应力效应的有效指标. 煤大分子基本结构单元堆砌度Lc以及La...
Abstract: As a consequence of treatments with glycine solutions, glycine molecules enter the interlayer of both Ca- and Cd-rich montmorillonite. Measurements of d value suggest that at low glycine con...
Abstract: 113Cd solid-state nuclear magnetic resonance (NMR) was used to identify possible Cd2+ adsorption sites in montmorillonite. The montmorillonite was treated with 0.1 and 1 M CdCl2 aqueous solu...
A new method to extract quantitative information from poorly resolved Si magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectra of natural mixed-layer illite-smectite (I-S) clays29Si i...
Pyrope-grossular solid solutions, (Mg,Ca) Al Si O , of composition Py Gr and Py Gr were3 2 3 12 85 15 75 25 synthesized at 1000, 1200, and 1400 ?C and 30 kbars in a piston-cylinder device. The synt...
17Three- and five-quantum O MAS NMR experiments are used to resolve fully the three crystallo- graphically distinct oxygen species in forsterite (Mg SiO ). The chemical shift and quadrupolar pa-2 4...
The Cl NMR spectroscopy of Cl -intercalated hydrotalcite and the Ca-aluminate hydrate, the presence of hydrocalumite (Friedel°Os salt) demonstrates dynamical behavior of interlayer C dynamical orde...
A magic-angle-spinning nuclear magnetic resonance (MAS NMR) spectroscopic study was done on the series of synthetic gallian-fluor amphiboles to identify the extent of Ga and Si ordering in the Si MA...
29The SiMASNMRspectrumofarmenitefromWasenalp(Valais,Switzerland)indicates completeSi,Alordering.Thesamechemicalshifts(82.3,95.0,and101.8ppm)were alsomeasuredforarmenitefromRe!migny(Quebec,Canada),ho...
Abstract: Lode, a dioctahedral illite-rich clay from Latvia belonging to the mica group of clay minerals, undergoes thermal transformation via a series of structurally disordered intermediate phases. ...
25Mg NMR spectra for several silicate and aluminosilicate melts were obtained from 1000–1470 8C. The peaks are initially very broad, but narrow with increasing temperature to near 500 Hz at the highes...
Abstract: Eight kaolinite and 2 halloysite samples were analyzed using 27Al magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy, chemical analysis and magnetic susceptibility to und...
23Na and133Cs NMR T 1 relaxation data for wet paste samples made from illite and either NaCl or CsCl solutions show that there is significant adsorption of the Na and Cs onto the surface. The Na and C...
Two analcimes of hydrothermal and diagenetic origin were investigated by in situ29Si,27Al, and 23 Na NMR from room temperature to 550 8 C, and by TGA and DSC. The two samples dehydrate at different te...
We report the compositional systematics of the 29 Si MAS NMR spectra of richterite,[A](Na,K,Rb)1(Na,Ca,Sr)2Mg5Si8O22 (OH,F)2; pargasite, NaCa2Mg4AlSi6Al2O2(OH)2; and fluor-edenite, NaCa2Mg5Si7AlO22F2....

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