Results 31 to 40 of about 17,786 (291)

Rietveld refinement, magnetic and dielectric properties of Sr2+-Co2+-doped Zn2Y-type hexaferrites

Hybrid Advances, 2023
In this experimental study, Sr2+-Co2+ was doped in Zn2Y-type hexaferrite to improve its magnetic and dielectric properties. Sol-gel auto combustion was used to synthesize Ba2-xSrxZn2-yCoyFe12O22 (x ​= ​0.0, 0.4, 0.8 and y ​= ​0.0, 0.5, 1.0), and the ...
Ibrahim Mohammed, J. Mohammed, Tchouank Tekou Carol T, A.K. Srivastava   +3 more
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Pressing the Limits of Rietveld Refinement [PDF]

Australian Journal of Physics, 1988
Two examples are given, one with X-ray data and one with netltron data, of the determination of structural detail which appear to be at the edge of current possibility for the Rietveld structure-refinement method. In the first example, 2·2 wt% Sb substituted in CalO(P04)6F2 was located.
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Fifty years of Rietveld refinement: Methodology and guidelines in superconductors and functional magnetic nanoadsorbents

Revista de Investigación de Física, 2021
The Rietveld refinement method has taken high relevance since its creation. Nowadays, it is an useful tool in many fields of industry, materials science, and technology.
Diego Alberto Flores Cano, Anais Roxana Chino Quispe, Renzo Rueda Vellasmin, Joao Andre Ocampo Anticona, Juan Carlos González, Juan Adrián Ramos Guivar   +5 more
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Quantitative Analysis of Mineral Composition of Kyanite by X-ray Diffraction with Rietveld Refinement Method

Yankuang ceshi, 2019
BACKGROUND The content of minerals in kyanite can be analyzed by chemical phase method, but the analytical process is very tedious. Moreover, the existence of heteromorphism and refractory minerals can affect the accuracy of analysis results. An internal
RAN Jing, GUO Chuang-feng, DU Gu, WANG Feng-yu   +3 more
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Crystal Structure Refinement of Synthetic Pure Gyrolite

Medžiagotyra, 2015
Pure calcium silicate hydrate – gyrolite was prepared under the saturated steam pressure at 473 K temperature in rotating autoclave. The crystal structure of synthetic gyrolite was investigated by X-ray diffraction and refined using Le Bail, Rietveld and
Arūnas Baltušnikas, Raimundas Šiaučiūnas, Irena Lukošiūtė, Kęstutis Baltakys, Anatolijus Eisinas, Rita Kriūkienė   +5 more
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Global Rietveld refinement

Journal of Research of the National Institute of Standards and Technology, 2004
Global optimisation methods of structure determination from powder diffraction data have risen to prominence in a relatively short space of time and they now constitute a key approach in the examination of polycrystalline molecular organic materials. A correctly formulated global optimisation approach may be regarded as a "global Rietveld refinement ...
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Rietveld refinement of the RNi4B compounds (R = Gd, Tb, Er)

, 2007
Based on Rietveld refinement of X-ray powder diffraction data collected from RNi4B samples (R = Gd, Tb, Er) annealed at 1070 K, a CeCo4B structure type (space group P6/mmm (N191), Z= 2) was determined for all ...
O. L. SOLOGUB, RIZZOLI C., A. P. GONÇALVES, J. R. HESTER, P. S. SALAMAKHA, M. ALMEIDA   +5 more
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Investigation on the crystal structure and mechanical properties of the ternary compound Mg11-xZnxSr combined with experimental measurements and first-principles calculations

Journal of Magnesium and Alloys, 2023
A new ternary compound, Mg11-xZnxSr in the Mg-Zn-Sr system was observed and studied using Scanning Electron Microscopy (SEM), Energy-Dispersive Spectroscope (EDS), X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM).
Jian Wang, Lingzhong Meng, Zhang Zhang, Baisheng Sa, Xiaoxiao Fu, Liyuan Sheng, Daokui Xu, Yufeng Zheng   +7 more
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The Rietveld Refinement in the EXPO Software: A Powerful Tool at the End of the Elaborate Crystal Structure Solution Pathway

Crystals, 2018
The Rietveld method is the most reliable and powerful tool for refining crystal structure when powder diffraction data are available. It requires that the structure model to be adjusted is as close as possible to the true structure.
Angela Altomare, Francesco Capitelli, Nicola Corriero, Corrado Cuocci, Aurelia Falcicchio, Anna Moliterni, Rosanna Rizzi   +6 more
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Structural studies into AM(_2)O(_7) framework materials and parametric Rietveld refinement [PDF]

, 2006
This thesis investigates the structural properties of the AM2O7 family of materials, many of which show interesting thermal expansion properties and remarkably complex structures.
Stinton, Graham William
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