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Combined Neutron and X-Ray Diffraction Study of Ibuprofen and Atenolol Adsorption in Zeolite Y. [PDF]
MoleculesMartucci A +6 more
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Structure and Spin-Glass Magnetism of the Fe<sub>1.5</sub>Ni<sub>1.5</sub>Ga<sub>4</sub> Metallic Alloy. [PDF]
Inorg ChemBuxi K +11 more
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Rietveld refinement of nanocrystalline phases
Nanostructured Materials, 1997Abstract Nanocrystalline phases give rise to x-ray diffraction patterns similar to those obtained for the corresponding microcrystalline system, but broadened by effect of crystallite size. Because of this similarity, for the analysis of the diffraction patterns of nanostructures, the x-ray diffraction techniques developed for microcrystalline ...
null Bokhimi +3 more
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Rietveld Structure Refinement of Zeolite ECR-1
Chemistry of Materials, 2005In this work, we present the structure refinement of ECR-1 to give the first direct evidence of the proposed structure of this synthetic zeolite. In fact, a model of the structure of ECR-1 was proposed on the basis of high-resolution transmission electron microscopy (HRTEM) evidence and the structure solution of the synthetic gallo-silicate TNU-7, but ...
GUALTIERI, Alessandro +4 more
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Reviews in Mineralogy and Geochemistry, 2006
A polycrystalline powder can be represented in reciprocal space as a set of nested spherical shells positioned with their centers at the origin (Warren 1990) (Fig. 1⇓). These shells each arise from a reciprocal lattice point from the myriad (e.g. ~109 mm−3 for 1μm crystallites) of small crystals, ideally with random orientation, in the sample.
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A polycrystalline powder can be represented in reciprocal space as a set of nested spherical shells positioned with their centers at the origin (Warren 1990) (Fig. 1⇓). These shells each arise from a reciprocal lattice point from the myriad (e.g. ~109 mm−3 for 1μm crystallites) of small crystals, ideally with random orientation, in the sample.
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Rietveld Refinement Using Debye-Scherrer Film Techniques
Materials Science Forum, 1996The advent of modern diffractometers has overcome the old film techniques that were used during the past years. One reason is that computer-controlled diffractometers made available data in a formal ready for the analyses, and the intensities obtained do not suffer for non-linear correction and are very much reliable.
Lutterotti L. +2 more
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Rietveld refinement of a wrong crystal structure
Acta Crystallographica Section B Structural Science, 2007Rietveld refinements are generally used to confirm crystal structures solved from powder diffraction data. If the Rietveld refinement converges with low R values and with a smooth difference curve, and the structure looks chemically sensible, the resulting structure is generally considered to be close to the correct crystal structure. Here we present a
Christian, Buchsbaum, Martin U, Schmidt
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Texture in Rietveld refinement
Journal of Applied Crystallography, 1992A texture model suitable for use in Rietveld-refinement programs is proposed. It is based on the series expansion of the pole distribution function in symmetrized harmonics. The model was tested on a textured plate sample of Al2O3.
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Rietveld Structure Refinement of Pr Doped Zirconia
Materials Science Forum, 2000This work deals with the synthesis and Rietveld structure refinement of a zirconium-praseodymium yellow pigment prepared either by a traditional ceramic process route and by an unconventional synthesis method based on SHS (Self-Propagating High-Temperature Synthesis).
FERRARI, Anna Maria +4 more
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