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Crystal structure refinement of palygorskite from neutron powder diffraction
palygorskite structure neutron powder refinement zeolitic water clay mineral
2011/11/4
Palygorskite is a Mg-rich fibrous clay, present in nature as a mixture of two intricately intertwined polymorphs –monoclinic (C2/m) and orthorhombic (Pbmn) –characterized by the presence of channels a...
In situ neutron diffraction study of non-convergent cation ordering in the (Fe3O4)1-x(MgAl2O4)x spinel solid solution
non-convergent cation ordering (Fe3O4)1-x(MgAl2O4)x spinel solid solution
2012/3/31
Non-convergent cation ordering in the (Fe O ) (MgAl O ) solid solution was investigated us-
ing in-situ time-of-flight neutron powder diffraction. The approach to equilibrium in a sample with
x = 0...
Thermodynamics and kinetics of cation ordering in MgAl2O4 spinel up to 1600 °C from in situ neutron diffraction
MgAl2O4 temperature to 1600C situ neutron diffraction
2012/3/30
Thetemperaturedependenceofthecationdistributioninsyntheticspinel(MgAl O )was2 4
determinedusingin-situtime-of-?ightneutronpowderdiffraction.Neutrondiffractionpat-
ternsofstoichiometricMgAl
O andsli...
The temperature dependence of the cation distribution in synthetic hercynite (FeAl2O4) from the in-situ neutron structure refinements
temperature dependence cation distribution synthetic hercynite (FeAl2O4) in-situ neutron structure refinements
2012/4/1
The temperature dependence of the cation distribution in synthetic hercynite (FeAl2O4) has been determined using in-situ time-of-flight neutron powder diffraction. The sample was synthesized from the ...
Structure Refinement of Synthetic Deuterated Kaolinite by Rietveld Analysis Using Time-of-Flight Neutron Powder Diffraction Data
Crystal Structure Kaolinite Neutron Powder Diffraction Rietveld Refinement Synthetic Kaolinite
2011/12/22
Abstract: The crystal structure of synthetic deuterated kaolinite was refined by Rietveld analysis using time-of-flight (TOF) neutron powder diffraction data. For non-hydrogen atoms, C1 symmetry was a...
Neutron powder diffraction study of hydrogarnet to 9.0 GPa
Neutron powder diffraction study of hydrogarnet 9.0 GPa
2012/4/1
cell parameter at each pressure (5.7-42.3 GPa) was calculated
from the positions of four reflections (321, 400, 420, and 521)
fit by pure Gaussian profiles. With the assumption that the pres-
sure ...
Structural behavior, crystal chemistry, and phase transitions in substituted leucite: High-resolution neutron powder diffraction studies
Structural behavior crystal chemistry phase transitions substituted leucite High-resolution neutron powder diffraction studies
2012/4/1
High-resolution neutron powder diffraction was used to study phase transitions in theleucite phases of KAlSi206, RbAlSi20", CsAlSi206, and KFeSi206. Thetemperature-depen-dent structural behavior invol...
Hydrogen positions and thermal expansion in lizardite-1T from Elba: A low-temperature study using Rietveld refinement of neutron diffraction data
Hydrogen positions thermal expansion lizardite-1T Elba low-temperature study neutron diffraction data
2012/4/6
Thestructure oflizardite-l Tfrom MonteFico,Elba,wasrefined in spacegroupP31m usingneutron diffractiondata, measuredat 8, 150,and 294K,and full-profile Rietveld
refinement techniques. Thelattice param...
Neutron powder diffraction study of hydrogarnet to 9.0 Gpa
Neutron powder hydrogarnet 9.0 Gpa
2012/4/6
The crystal structure of synthetic, deuterated katoite [Ca3A12(0.D.)3] has been refined at 0.0001,0.78,3.6,6.1,7.9, and 9.0 GPa using the opposed-anvil Paris-Edinburgh cell and the POLARIS powder diff...
Thermal expansion of gypsum investigated by neutron powder diffraction
Thermal expansion gypsum investigated neutron powder diffraction
2012/4/6
The cell parameters of deuterated gypsum have been extracted from Rietveld anal-ysis of powder neutron diffraction data within the temperature range 4.2-320 K.The thermal expansion of gypsum is highly...
Neutron Diffraction Study of a One-Layer Monoclinic Chlorite
Cation ordering Chlorite Crystal structure Hydrogen bonding Neutron diffraction
2012/1/6
A monoclinic IIb-2 clinochlore from the Achmatov mine, Ural Mountains, U.S.S.R., was investigated by neutron diffraction. The formula, based on electron microprobe and wet chemical analyses, is (Mg4.5...
Hydrogen Atom Positions in Kaolinite by Neutron Profile Refinement
Crystal structure Hydrogen Kaolinite Neutron profile refinement O-H vector Rietveld method
2012/2/7
A structure refinement of kaolinite made using the Rietveld neutron profile refinement technique has given non-hydrogen atom positions which were not significantly different from those given by B. B. ...
Diffusion of Water in Li-Montmorillonite Studied by Quasielastic Neutron Scattering
Diffusion Montmorillonite Neutron scattering Water
2012/2/8
The diffusion of water in Li-montmorillonite was studied by incoherent quasielastic neutron scattering. Experiments were carried out on sedimented samples equilibrated at relative humidities of 32%, 5...
Interfacial Water Structure in Montmorillonite from Neutron Diffraction Experiments
Clay-water system Hydroxyl orientation Interlayer water Montmorillonite Neutron diffraction
2011/11/22
Abstract: Neutron diffraction measurements for a preferentially oriented aggregate slab sample of deuterated Na-montmorillonite from Upton, Wyoming, are described for a series of clay-water contents r...
Neutron Diffraction from Clay-Water Systems
Humidity Montmorillonite Neutron Quasielastic
2011/11/18
Abstract: The use of neutron diffraction to determine some of the structural properties of montmorillonite-water systems at low water concentrations is described. The samples were prepared by compress...