Results 1 to 10 of about 18,381 (288)

Full-profile search-match by the Rietveld method. [PDF]

J Appl Crystallogr, 2019
A new search–match procedure has been developed and tested which, in contrast to previously existing methods, does not use a set of lines identified from a diffraction pattern, but an optimized Rietveld fitting on the raw data. Modern computers with multicore processors allow the routine to be fast enough to perform the entire search in a reasonable ...
Lutterotti L, Pillière H, Fontugne C, Boullay P, Chateigner D.   +4 more
europepmc   +6 more sources

Structural Analysis of Interstratified Illite-Smectite by the Rietveld Method

Crystals, 2021
Rietveld method is a powerful tool in obtaining structural information of clay minerals by using of X-ray diffraction (XRD) patterns. However, the interstratified illite-smectites (I-S) show various stacking defects preventing the direct application of ...
Xiaoli Wang, Hejing Wang
doaj   +2 more sources

Accuracy and Error Sources of the Rietveld Full Pattern Fitting Method in Quantitative Analysis of Illite Ores

Yankuang ceshi, 2022
BACKGROUND Illite is an important mineral resource. It is of great theoretical and practical significance to accurately obtain the mineral composition and content of illite ores. The Rietveld full pattern fitting method uses the whole diffraction pattern
CHEN Aiqing, ZHANG Lixue, LI Qiang, ZHU Jianxi, LI Shangying, HE Hongping   +5 more
doaj   +2 more sources

Synthesis of hydroxyapatite doped with single and compound dopants and study upon the effect of crystal phase on its thermoluminescence response irradiated by gamma rays [PDF]

مجله علوم و فنون هسته‌ای, 2023
In this research work, hydroxyapatite samples doped with cerium, gadolinium, and a combination of these two dopants were synthesized through the hydrothermal method.
P. Taghipour Niar, ّF. Zolfagharpour, F. Ziaie, H. Daneshvar   +3 more
doaj   +1 more source

Oxide layer characterization by XRD and Rietveld refinements in maraging steel 300 aged in steam atmosphere

Brazilian Journal of Radiation Sciences, 2021
Maraging steels are martensitic steels hardened by precipitation of intermetallic compounds in thermal aging, with good machining properties and high strength, fracture toughness and corrosion resistance, being used in aircraft parts and rocket motor ...
Vanessa Sanches Pereira da Silva, José Roberto Ferreira Neto, Silvia Lucas Ferreira da Silva, Diogo Costa de Oliveira, Fábio de Camargo   +4 more
doaj   +1 more source

Synthesis and Crystal Structure of the Ordered Vacancy Compound Cu3In5Se9

Orbital: The Electronic Journal of Chemistry, 2021
This work focuses on the preparation and structural characterization of the semiconductor Cu3In5Se9, an important member of ordered vacancy compounds family, belonging to the semiconductor system I3-III5--VI9, where denotes the cation vacancy which is ...
Gerzon E. Delgado, Giovanni Marin, Syed Wasim, Carlos Rincón, Dinesh P. Singh   +4 more
doaj   +1 more source

Quantitative Phase Analysis by X-ray Diffraction—Doping Methods and Applications

Crystals, 2020
X-ray powder diffraction is an ideal technique for the quantitative analysis of a multiphase sample. The intensities of diffraction lines of a phase in a multiphase sample are proportional to the phase fraction and the quantitative analysis can be ...
Stanko Popović
doaj   +1 more source

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
doaj   +1 more source

Green Synthesis of Nanocomposite of Ag/Ag2O Using Coelomic Liquid: Optical Absorption Analysis [PDF]

Nanochemistry Research
In this research, silver and silver oxide (Ag/Ag2O) nanocomposites were synthesized using a green method at different concentrations of silver nitrate.
Esmaeil Shahriari, Morteza Raeisi, Karim Aliakbari   +2 more
doaj   +1 more source

Preparation and characterization of alkali-activated white belite cements

Materiales de Construccion, 2009
Activated white cement clinkers with a theoretical 60% (wt) belite (dicalcium silicate) content were prepared at a temperature 100 ºC lower than used to manufacture conventional white Portland cement clinkers.
K. Morsli, Ángeles G. de la Torre, Antonio J. M. Cuberos, Mohammed Zahir, Miguel A. G. Aranda   +4 more
doaj   +1 more source