نتایج جستجو برای: rietveld refinement

تعداد نتایج: 34023  

Journal: :Journal of Applied Crystallography 2002

2017

The second English edition is largely based on the third German edition of the Teubner Studienbuch “ Kristallstrukturbestimmung,” which appeared in 2002. In particular, Chapter 7, dealing with experimental methods, has been extensively rewritten. In view of the huge recent advances in the use of area detector systems for single-crystal data collection, their description has replaced much of the...

2007
Armel Le Bail

Innovative applications of the Rietveld method [1-3] are likely to include new developments in microstructure analysis. More and more samples show microstructure effects on line profile shape, width and position. Reasons are obviously the powder diffractometer resolution improvements at leading synchrotron sources, and the increasing user number. When the minimal full width at half maximum is a...

2008
Xim Bokhimi Antonio Morales Rodolfo Zanella A. P

The microstructure of gold catalysts supported on rutile was obtained by Rietveld refinement. Three-dimensional images of the crystallites were generated in real space, as well as 3-D images of the microstrain distribution in reciprocal space. These images were used to analyze the effect of the different parameters of the refinement models on the interpretation of the microstructure of the samp...

2018
Bob van Laar Henk Schenk

With thousands of references to `Rietveld refinement' it is forgotten that the method did not suddenly appear in a flash of inspiration of a single person, but was the result of the work of three individuals working in the 1960s at the Reactor Centre Netherlands at Petten, Loopstra, van Laar and Rietveld. This paper outlines the origins of `profile refinement', as it was called at Petten, and a...

2013
P. Tian W. Zhou J. Liu Y. Shang C. L. Farrow P. Juhás J. L. Billinge

SrRietveld is a highly automated software toolkit for Rietveld refinement. Compared to traditional refinement programs, it is more efficient to use and easier to learn. It is designed for modern high-throughput diffractometers and is capable of processing large numbers of data sets with minimal effort. The software currently uses conventional Rietveld refinement engines, automating GSAS and Ful...

Journal: :Journal of nanoscience and nanotechnology 2012
M Salari M Rezaee A T Chidembo K Konstantinov H K Liu

The structural evolution of nanocrystalline TiO2 was studied by X-ray diffraction (XRD) and the Rietveld refinement method (RRM). TiO2 powders were prepared by the sol-gel technique. Post annealing of as-synthesized powders in the temperature range from 500 degrees C to 800 degrees C under air and argon atmospheres led to the formation of TiO2 nanoparticles with mean crystallite size in the ran...

2005
DAVOR BALZAR NICOLAE C. POPA

Since its inception over 35 years ago, Rietveld refinement (Rietveld, 1969) has come a long way. In the beginning, the aim was to carry out crystal-structure refinement using neutron diffraction. As its primary purpose was refinement of the perfect crystal structures of polycrystalline samples, there was a need to introduce corrections to peak intensities and positions, as calculated for a perf...

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