Rietveld method
Mineralogical characterization of a highly-weathered soil by the Rietveld Method
... the Rietveld Method is not ...this Method with X-Ray Diffraction data to verify if this method was suitable for mineral quantification of a highly-weathered ...The Rietveld ...
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Structural characterization of Ti-15Mo alloy used as biomaterial by Rietveld method
... The biochemical and mechanical behavior of titanium alloys has been studied extensively for a variety of applications in the aerospace and biomedical fields. In the literature, there are studies that relate the ...
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Refinement of the isomorphic substitutions in goethite and hematite by the Rietveld method, and relevance to bauxite characterisation and processing
... Rietveld method-based mineral quantification with a funda- mental parameters approach (Cheary and Coelho, 1992) was per- formed with the help of Bruker-AXS’s Topas ...
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Structural determination of new solid solutions [Y2-x Mx ][Sn2-x Mx ]O7-3x/2 (M = Mg or Zn) by Rietveld method
... etveld method using Fullprof software [14], the atomic position set and the space group of the pyrochlore struc- ture Fd-3m, ...A Rietveld reinement was per- formed to minimize the function S y = ∑ i w i (y ...
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UNIVERSIDADE FEDERAL DE SÃO CARLOS CENTRO DE CIÊNCIAS EXATAS E DE TECNOLOGIA PROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA David Antonio Barbosa Quiroga
... reaction method, followed by conventional ...the Rietveld method of XRD data and by Raman spectroscopy were observed that for BNBK912 and BNBK930 compositions, at room temperature, the predominant ...
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Quantificação de Fases Cristalinas de Incrustações em Colunas de Produção de Petróleo pelo Método Rietveld
... The scale is defined as chemical compounds from inorganic nature, initially soluble in salt solutions, which may precipitate accumulate in columns of production and surface equipment. This work aimd to quantify the ...
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Cerâmica vol.60 número356 v60n356a10
... the Rietveld method. The method developed by H. Rietveld (1969) to reine crystalline structures using neutron diffraction data, extended its use to structural analysis, cell parameters ...
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Propriedades cristalográficas de caulinitas de solos do ambiente tabuleiros costeiros, Amazônia e Recôncavo Baiano.
... the Rietveld method; spectrum characterization by ERD to determine the hematite/goethite ratio; estimation of crystallographic properties (size and microtension) by DRX and mathematical models; the specific ...
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Desenvolvimento e aplicação de um software cristalográfico com protocolo de acesso a um banco de dados distribuído
... Hugo Rietveld created a method that uses this new technological paradigm and that today is known as the Rietveld ...the Rietveld method is complex and not linear which implies ...
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Synthesis of hydroxyapatite and structural refinement by x-ray diffraction.
... SYNTHESIS OF HYDROXYAPATITE AND STRUCTURAL REFINEMENT BY X-RAY DIFFRACTION. A sample of hydroxyapatite was synthesized and its crystalline structure was analyzed by X-ray diffraction by means of the Rietveld ...
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Braz. J. Phys. vol.34 número3B
... stable and irreversibly transforms to an orthorhombic structure above 460 o C. The structure of the latter was determined from studies on monocrystalline samples, whereas for the monoclinic variant there are no single ...
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J. Braz. Chem. Soc. vol.26 número9
... Mebendazole (MBZ) is an anthelmintic medicine known to exhibit the polymorphs A, B and C, where polymorph C is the one indicated for tablets. Mebendazole commercial tablets (references, generics and similars) were ...
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SINTERIZAÇÃO DE NANOPARTÍCULAS DE NiAl2O4 POR GELATINA COMESTÍVEL
... the Rietveld Method was applied in order to get the particle size, by means of Scherrer´s equation, lattice parameter, nanoparticle morphology and phase ...
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Caracterização estrutural da cerâmica Tix(Sm0,2Ce0,8)1-xO 2-d pelo método de Rietveld.
... Powders of Ti x (Sm 0.2 Ce 0.8 ) 1-x O 2-δ, 0 ≤ x ≤ 0.5, were synthesized by the polymeric precursor method. The treatment temperature ranged between 400 and 1000 ºC. The characterization was carried out by X-ray ...
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Estudo da orientação preferencial pelo método de Rietveld em amostras de ligas de alumínio
... This work is based on research conducted by the group that studied the preferred orientation of crystallographic planes of polycrystalline materials by a systematic carefull analysis of the mathematical equations ...
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Aplicação da difração de raios X por policristais e do método de Rietveld de refinamento de estruturas cristalinas no estudo de polimorfos cristalinos de fármacos
... the Rietveld Method, to quantify the amount of each polymorph in the ...(Rietveld method) and the other for the case where at least one crystalline phase has unknown crystal structure and the ...
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Mat. Res. vol.19 suppl.1
... separately, mix them in the right proportion and thereafter melt the mixture; ii) mix all elements in the desired stoichiometry and perform a single melt. However, irrespective of the synthesis method, the ...
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Characterization of nickel doped Zn7Sb2O12 spinel phase using Rietveld refinement
... The refinement results are summarized in Table I, Table II, and Figures 4 and 5. These two figures give the Rietveld plots for the cases with x50 and x54, respectively. Some of the following discussion requires ...
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Análise estrutural de uma hidroxiapatita carbonatada pelo método de Rietveld aplicando funções de perfil diferentes.
... difração de raios X através do método de Rietveld de refina- mento utilizando as funções Pearson VII e pseudo-Voigt para o ajuste do perfil. Os resultados obtidos para os parâmetros da célula unitária, quando ...
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Revestimentos a base de Ta/Al2O3 produzidos por aspersão térmica sobre substrato metálico
... Tabela 24 – Quantificação das fases obtidas pelo método de Rietveld do conjunto aspergido através da utilização da mistura EST+10%Al.. 103 Tabela 25 – Fatores estatístic[r] ...
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