搜索结果: 1-11 共查到“理学 Boehmite”相关记录11条 . 查询时间(0.093 秒)
Abstract: The persistence of many seemingly metastable mineral assemblages in sediments and soils is commonly attributed to their sluggish transformation to the stable-phase assemblage. Although undou...
Formation of Organic Derivatives of Boehmite by the Reaction of Gibbsite with Glycols and Aminoalcohols
Amino alcohol Boehmite Gibbsite Glycol Infrared spectroscopy Organic derivative X-ray powder diffraction
2011/12/31
The reaction of gibbsite in various organic solvents at 250°–300°C under spontaneous vapor pressure of the solvents was examined. Glycols and aminoalcohols afforded the organic derivatives of boehmite...
Alcohothermal Treatments of Gibbsite: Mechanisms for the Formation of Boehmite
Alcohol x-Alumina Boehmite Crystallization Gibbsite Thermal treatment
2011/11/30
Abstract: Gibbsite samples of various particle sizes (0.2?0 祄) were heated at 250癈 in a series of straight-chain primary alcohols under the autogenous vapor pressure of the alcohol (alcohothermal trea...
Relative Solubility of Corundum, Gibbsite, Boehmite, and Diaspore at Standard State Conditions
Acid solubility Aluminum Boehmite Corundum Diaspore Gibbsite
2012/1/9
The solubilities of HCl-treated samples of corundum, gibbsite, boehmite, and diaspore in aqueous solutions at 298 K and one atmosphere pressure were determined from undersaturated and supersaturated i...
Structure Refinement of Deuterated Boehmite
Boehmite Crystal structure Deuterium Hydrogen position Neutron diffraction Rietveld refinement
2011/11/25
Abstract: The crystal structure of a deuterated synthetic boehmite powder, 兞-AlOOD, has been determined by time-of-flight neutron diffraction and Rietveld profile refinement in space group Cmcm to a w...
Influence of Glycine on Cu2+ Adsorption by Microcrystalline Gibbsite and Boehmite
Adsorption Boehmite Copper Electron spin resonance Gibbsite Glycine Hydrolysis
2012/2/2
The adsorption of Cu2+ on microcrystalline gibbsite and boehmite from aqueous solutions having 2/1 and 5/1 glycine/Cu ratios has been studied using electron spin resonance (ESR). The presence of glyci...
Hydrogen Atoms in Boehmite: A Single Crystal X-Ray Diffraction and Molecular Orbital Study
Aluminum hydroxide Boehmite Crystal structure Electron density Hydrogen positions Molecular orbitals Single crystal
2012/2/8
The crystal structure of natural boehmite, AlOOH, from Tveidalen, Langesundsfjorden, Norway, with a = 3.693(1), b = 12.221(2) and c = 2.865(1) Å, was refined from single crystal X-ray diffractio...
Crystal Chemistry of Boehmite
Boehmite Crystallite size Pseudoboehmite Synthesis X-ray powder diffraction
2012/2/9
Thirty two boehmites, synthesized at temperatures ranging from room temperature to 300°C were examined by scanning electron microscopy, transmission electron microscopy, electron diffraction, X-ray po...
The Crystal Structure of Boehmite
Boehmite Crystal Structure O-OH Distances Powder X-ray Diffraction Synthesis
2012/2/9
The crystal structure of a synthetic boehmite sample has been refined to an R of 0.047 in the space group Amam from X-ray powder diffraction data. Inclusion of hydrogen atoms and/or refinement in the ...
The Stability of Gibbsite and Boehmite at the Surface of the Earth
Stability Gibbsite Boehmite Surface the Earth
2012/2/20
Two mutually exclusive views exist concerning the relative stabilities of gibbsite and boehmite in soils. These are examined in terms of experimental and thermodynamic evidence and it is shown that al...
A Pulsed NMR Study of the Interfacial Water of a Disperse Suspension of Boehmite
NMR Study Interfacial Water Disperse Suspension Boehmite
2011/11/16
A model is presented for interpreting the observed nuclear spin relaxation of the protons in the water molecules of the dispersing phase in terms of the modification of molecular motion in the solid-l...