Results 11 to 20 of about 18,381 (288)

Mineralogical characterization of a highly-weathered soil by the Rietveld Method Caracterização mineralógica de um solo altamente intemperizado pelo Método de Rietveld [PDF]

open access: yesScientia Agricola, 2010
The mineralogical characterization through mineral quantification of Brazilian soils by X-ray diffraction data using the Rietveld Method is not common.
André Maurício Brinatti   +4 more
doaj   +2 more sources

Application of the Rietveld method to the analysis of anhydrous cement [PDF]

open access: yesCement and Concrete Research, 2011
X-ray powder diffraction allows direct measurement of the phase content in cement. More recently, whole pattern approaches such as the Rietveld method show an improvement in both within (repeatability) and between laboratory (reproducibility) precision.
Le Saoût, Gwenn   +2 more
core   +4 more sources

Analysis of Rietveld Method Application for Gyrolite Crystal Structure Refinement

open access: yesMedžiagotyra, 2012
The several simulated X-ray diffraction patterns for calcium silicate hydrate – gyrolite were calculated with GSAS program using the structural model of natural mineral gyrolite and profile parameters values determined from refining crystal structure of ...
Arūnas BALTUŠNIKAS   +5 more
doaj   +2 more sources

THE USE OF THE RIETVELD METHOD TO STUDY THE PHASE COMPOSITION OF CORDIERITE (Mg2Al4Si5O18) CERAMICS PREPARED FROM RICE HUSK SILICA

open access: yesMakara Seri Sains, 2011
This research presents the use of the Rietveld method to study the phase composition of cordierite (MG2AL4SI5O18) ceramics prepared from rice husk silica, after the samples were sintered at 1300, 1400 and 1500 °C.
Simon Sembiring
doaj   +3 more sources

Study of Constitutive Behavior of Ferroelectrics via Self-Consistent Modeling and Neutron Diffraction [PDF]

open access: yes, 2007
The central goal of this study is to develop a reliable self-consistent model to describe the constitutive behavior of polycrystalline ferroelectrics and to predict their lattice strain and texture evolution. Starting with the model developed by Huber et
Motahari, Seyed-Maziar
core   +1 more source

Synthesis, Structure, and Luminescent Properties of the New Double Borate K3Eu3B4O12

open access: yesКонденсированные среды и межфазные границы, 2020
The study established the formation of the new double borate K3Eu3B4O12. The Rietveld refi nement of the crystal structure revealed that K3Eu3B4O12 crystallises in the monoclinic syngony with unit cell parameters a = 10.6727(7) Å, b = 8.9086(6) Å, c = 13.
Evgeniy V. Kovtunets   +2 more
doaj   +1 more source

The Role of Base Solvent Variant to Structure and Crystal Size Titanium Dioxide (TiO2) by Hydrothermal Method

open access: yesIndonesian Journal of Chemistry, 2017
Photoactivity of titanium dioxide (TiO2) can be improved by turning it into nanoparticles. Synthesis of TiO2 nanoparticles can be done by using hydrothermal method.
Mohammad Rofik Usman   +2 more
doaj   +1 more source

Determination of metallization degree of pre-reduced chromite with image and rietveld analysis [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2020
Metallization degree of pre-reduced chromite was determined using two methods. The chromite samples were reduced in the solid state by methane-hydrogen gas mixtures.
Leino T., Taskinen P., Eric R.H.
doaj   +1 more source

Vaporization and Poor Wettability as the Main Challenges in Fabrication of TiB2-Cu Cermets Studied by SPS

open access: yesMetals, 2014
TiB2-Cu cermets with various volume fractions of copper (from 3 to 30 vol. %) were produced via liquid phase sintering at the temperature range 1100–1200 °C in vacuum using spark plasma sintering (SPS) technique.
Marta Ziemnicka-Sylwester
doaj   +1 more source

Structural Characterization of the Hot-rolled Ti-25Ta-xZr Alloys by Rietveld Method

open access: yesMaterials Research, 2023
This paper aims to analyze the structure of the Ti-25Ta-xZr system alloys (x = 0, 10, 20, 30, and 40% wt.) after melting and hot-rolling by Rietveld's technique.
Pedro Akira Bazaglia Kuroda   +2 more
doaj   +1 more source

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