Results 141 to 150 of about 33,137,902 (193)
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Journal of Applied Crystallography, 1997
This paper describes a variant of the Rietveld refinement procedure applied to the characterization by)C-ray scattering of disordered and small crystals as found in semicrystalline polymers. The program essentially focuses on the profile of the reflections and allows one to obtain the size, unit-cell parameters and lattice distortions (atomic ...
O. Dupont, A. Jonas, R. Legras
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This paper describes a variant of the Rietveld refinement procedure applied to the characterization by)C-ray scattering of disordered and small crystals as found in semicrystalline polymers. The program essentially focuses on the profile of the reflections and allows one to obtain the size, unit-cell parameters and lattice distortions (atomic ...
O. Dupont, A. Jonas, R. Legras
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Size-Strain and Quantitative Phase Analysis by the Rietveld Method
Advances in X-ray Analysis, 1991AbstractA modified version of the Rietveld method has been developed for quantitative phase analysis in conjunction with crystallite size and microstrain determination.Besides the information on the microstructural disorder in the different phases present in the sample, accurate phase analysis can be performed, even in presence of anisotropic ...
Scardi, Paolo +2 more
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1993
Abstract The Rietveld method is a powerful and relatively new method for extracting detailed crystal structural information from X-ray and neutron powder diffraction data. Since such structural details dictate much of the physical and chemical attributes of materials, knowledge of them is crucial to our understanding of those ...
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Abstract The Rietveld method is a powerful and relatively new method for extracting detailed crystal structural information from X-ray and neutron powder diffraction data. Since such structural details dictate much of the physical and chemical attributes of materials, knowledge of them is crucial to our understanding of those ...
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Journal of Building Engineering, 2022
Andrielli Morais de Oliveira +4 more
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Andrielli Morais de Oliveira +4 more
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Structure of Carbonated Hydroxyapatite Based on Rietveld Method
Key Engineering Materials, 2008The crystalline structures of B-type carbonated hydroxyapatite (CHA) powders sintered at 700, 900 and 1100°C, respectively, were studied by Rietveld analysis of powder X-ray diffraction (XRD) data. A series of structure parameters, including lattice parameters (a and c), bond length and the distortion index of PO4 tetrahedron (Dind) were calculated by ...
Xu Ran +4 more
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Introduction to the Rietveld method
1993Abstract In Chapter 2, Dr Rietveld has provided an account of the inception and early development of his method and of the growth of its acceptance from being initially ignored to the very widespread and vigorous use in many fields that it now enjoys. In this chapter, we provide a general introductory account of what the method is and
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WPPM: Microstructural Analysis beyond the Rietveld Method
Materials Science Forum, 2010The basics of the Whole Powder Pattern Modeling and its implementation in the PM2K software are briefly reviewed. The main features and functionalities, and most common line broadening models are introduced with the aid of working examples related to the instrumental profile and to a plastically deformed metal.
Scardi, Paolo +2 more
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Determination of the crystal structure of khanneshite by the Rietveld method
Crystallography Reports, 2002The crystal structure of khanneshite (Na2.75Ca0.23)2.98(Ba1.08Sr0.63Ca0.46Ce0.46La0.18Nd0.15Pr0.04)3.00 · (CO3)5 found in carbonatites from the Khibiny massif (the Kola Peninsula) was solved by the Rietveld method. The X-ray diffraction data were collected on a focusing STOE-STADIP diffractometer equipped with a bent Ge(111) primary-beam monochromator (
Yu. V. Belovitskaya +4 more
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Amorphous/nanocrystalline composites analysed by the Rietveld method
Journal of Alloys and Compounds, 2010The Rietveld refinement approach has been applied to semi-crystalline materials in the case of bulk metallic glasses. Specifically, the crystallisation behaviour of a Fe48Cr15Mo14Y2C15B6 bulk metallic glass has been investigated by in situ X-ray diffraction obtained using a high intensity monochromatic synchrotron beam at the ID11 line of ESRF in ...
Baricco, M. +5 more
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Quantitative phase analysis of bentonites by the rietveld method
Clays and Clay Minerals, 2008AbstractThirty six bentonite samples from 16 different locations were examined in order to demonstrate the applicability of a new Rietveld description approach for quantitative phase analysis. X-ray diffraction patterns of the bulk material were obtained and analyzed by the Rietveld method.
Ufer, Kristian +5 more
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