搜索结果: 1-15 共查到“地质学 Solid-state”相关记录15条 . 查询时间(0.323 秒)
Characterization of Silanol Groups in Protonated Magadiite by 1H and 2H Solid-State Nuclear Magnetic Resonance
1H NMR 2H NMR Hydrogen Bonding Magadiite Silanol Group
2011/12/6
Abstract: Silanol groups in protonated magadiite (H-magadiite) were characterized by 1H and 2H solid-state nuclear magnetic resonance (NMR). H-magadiite and deuterated (D) magadiite were synthesized b...
Trace element distribution among rock-forming minerals in Black Hills migmatites, South Dakota: A case for solid-state equilibrium
rock-forming minerals Black Hills migmatites solid-state equilibrium South Dakota
2012/3/31
Proterozoic migmatites in the Black Hills, South Dakota, were examined to determine if parti-
tioning of trace elements hosted by rock-forming minerals between melanosomes and leucosomes
preserves r...
Solid-state 29Si MAS NMR studies of illite and illite-smectite from shale
Solid-state 29Si MAS NMR studies illite illite-smectite shale
2012/4/1
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...
Solid State NMR Characterization of the Thermal Transformation of an Illite-Rich Clay
Illite Iron Paramagnetic Center Solid-State NMR Thermal Transformation
2011/12/9
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. ...
The Intercalation of Kaolinite by Alkali Halides in the Solid State: A Systematic Study of the Intercalates and Their Derivatives
Alkali halide Intercalate Kaolinite Structure Synthesis XRD
2011/12/1
Abstract: Kaolinite: alkali halide intercalates have been successfully prepared by grinding the salt with kaolinite in the absence of water. Rate of intercalation is shown to correlate negatively with...
The Interlayer Collapse during Dehydration of Synthetic Na0.7-Beidellite: A 23Na Solid-State Magic-Angle Spinning NMR Study
Beidellite Dehydration Interlayer collapse 23Na MAS-NMR
2011/12/31
The dehydration and migration of the interlayer cation of the synthetic beidellite Na0.7Al4.7Si7.3O20-(OH)4·nH2O, were studied with solid-state 23Na and 27Al MAS-NMR, heating stage XRD, and thermograv...
Solid-State Intercalation of Naphthalene and Anthracene into Alkylammonium-Montmorillonites
Alkylammonium-montmorillonites Anthracene Intercalation Naphthalene Solid-state intercalation
2011/12/31
Intercalation of naphthalene and anthracene into alkyltrimethylammonium (CnH2n+1(CH3)3N+; n = 8, 12, 14, 16, and 18)-montmorillonites was carried out by novel solid-solid reactions at room temperature...
39K Solid-State NMR Studies of Potassium Tecto- and Phyllosilicates: The In Situ Detection of Hydratable K+ in Smectites
Potassium Solid-state NMR Phyllosilicates Vermiculite Montmorillonite
2011/12/30
We report the first application of 39K solid-state NMR to the study of tecto- and phyllosilicates. Under high field (11.7 Tesla) and with the application of a spin-echo sequence, informative 39K spect...
The Structure and Thermal Transformations of Allophanes Studied by 29Si and 27Al High Resolution Solid-State NMR
Allophane ?Imogolite ?Dehydroxylation ?Crystal structure ?Nuclear magnetic resonance ?Thermal treatment ?X-ray powder diffraction
2011/12/31
Examination of two volcanic and two precipitated allophanes by solid-state NMR, thermal analysis and X-ray powder diffraction shows three of the samples to contain structural features similar to both ...
Mechanisms of Palygorskite and Sepiolite Alteration as Deduced from Solid-State 27Al and 29Si Nuclear Magnetic Resonance Spectroscopy
Al coordination Hydrothermal transformation Nuclear magnetic resonance Palygorskite Sepiolite Smectite X-ray powder diffraction
2012/1/6
The mechanisms of palygorskite and sepiolite alteration to smectite under mild hydrothermal conditions were investigated by solid-state 27Al and 29Si magic-angle spinning-nuclear magnetic resonance (M...
Quantification of Crystalline and Noncrystalline Material in Ground Kaolinite by X-ray Powder Diffraction, Infrared, Solid-State Nuclear Magnetic Resonance, and Chemical-Dissolution Analyses
Chemical dissolution Dry grinding Infrared spectroscopy Kaolinite Noncrystalline Nuclear magnetic resonance X-ray powder diffraction
2012/1/5
The capabilities of X-ray powder diffraction (XRD), infrared absorption (IR), solid-state magic-angle-spinning nuclear magnetic resonance (MAS-NMR), and chemical dissolution methods were assessed for ...
Structure and Thermal Transformations of Imogolite Studied by 29Si and 27Al High-Resolution Solid-State Nuclear Magnetic Resonance
Aluminosilicate gel Crystal structure Dehydroxylation Imogolite Nuclear magnetic resonance Thermal treatment X-ray powder diffraction
2012/1/5
Solid-state nuclear magnetic resonance (NMR) spectroscopy, thermal analysis, and X-ray powder diffraction data on the tubular, hydrous aluminosilicate imogolite were found to be fully consistent with ...
Effect of Ambient Atmosphere on Solid State Reaction of Kaolin-salt Mixtures
Infrared spectroscopy Gaseous atmosphere Kaolin Metakaolin Salt Thermal analysis
2012/1/12
The reaction of kaolin with NaCl was followed by dynamic thermal analysis and mass spectrometry under N2, CO2, and air atmospheres and in a 10−5-torr vacuum. The weight loss was a function of th...
DETECTION OF NONEQUIVALENT Si SITES IN SEPIOLITE AND PALYGORSKITE BY SOLID-STATE 29Si MAGIC ANGLE SPINNING-NUCLEAR MAGNETIC RESONANCE
Magic angle spinning-nuclear magnetic resonance Nuclear magnetic resonance Palygorskite Sepiolite Silicon sites
2011/11/16
DETECTION OF NONEQUIVALENT Si SITES IN SEPIOLITE AND PALYGORSKITE BY SOLID-STATE 29Si MAGIC ANGLE SPINNING-NUCLEAR MAGNETIC RESONANCE.
Interpretation of Solid State 13C and 29Si Nuclear Magnetic Resonance Spectra of Kaolinite Intercalates
Dimethylsulfoxide Formamide Hydrazine Intercalate Nuclear magnetic resonance Ordering Pyridine-N-oxide
2012/1/13
13C and 29Si nuclear magnetic resonance spectroscopy with magic-angle spinning bas been used to study the short-range ordering and bonding in the structures of intercalates of kaolinite with formamide...