Interlaboratory Comparison (Round Robin) of the Application of the Rietveld Method to Quantitative Phase Analysis by X-Ray and Neutron Diffraction

The quality of X-ray powder diffraction data and the number and type of refinable parameters have been examined with respect to their effect on quantitative phase analysis (QPA) by the Rietveld method using data collected from two samples from the QPA round robin [Madsen, Scarlett, Cranswick & Lwin (2001). J. Appl. Cryst. 34, 409–426]. From the analyses of these best-case-scenario specimens, a series of recommendations for minimum standards of data collection and analysis are proposed. It is hoped that these will aid new QPA-by-Rietveld users in their analyses.

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Evaluation via multivariate techniques of scale factor variability in the rietveld method applied to quantitative phase analysis with X ray powder diffraction

Materials Research ◽

10.1590/s1516-14392006000400005 ◽

2006 ◽

Vol 9 (4) ◽

pp. 369-374 ◽

Cited By ~ 3

Author(s):

Terezinha Ferreira de Oliveira ◽

Roberto Ribeiro de Avillez ◽

Eugenio Kahn Epprecht ◽

Joaquim Carlos Barbosa Queiroz

Keyword(s):

Phase Analysis ◽

Powder Diffraction ◽

Rietveld Method ◽

Scale Factor ◽

Quantitative Phase Analysis ◽

Multivariate Techniques ◽

X Ray ◽

Quantitative Phase

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Effect of Testing Factors on Rietveld Quantitative Analysis of Cement-Matrix Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.898.2054 ◽

2017 ◽

Vol 898 ◽

pp. 2054-2059

Author(s):

Yan Ling Gan ◽

Su Ping Cui ◽

Ya Li Wang ◽

Hong Xia Guo

Keyword(s):

Quantitative Analysis ◽

Phase Analysis ◽

Rietveld Method ◽

Cementitious Materials ◽

Cement Matrix ◽

Quantitative Phase Analysis ◽

Step Size ◽

X Ray ◽

Quantitative Phase ◽

Scan Time

For cement-matrix materials, the microstructure plays a vital important role in the research. Recently, quantitative phase analysis of cementitious materials can be performed using the Rietveld method by fitting the calculated X-ray diffraction (XRD) profile with the observed one. The aim of this paper is to further perform the quantitative analysis by the Rietveld method and discuss the influence of testing factors on the Rietveld quantitative phase analysis. The factors included the collection range of pattern, step size and the scan time of per step. In this study, the chemical composition of the samples was determined by X-ray fluorescence (XRF) spectrometry. And their phase composition was calculated by X-ray powder diffraction and Rietveld analysis. The results showed that the collection range of pattern depended on the tested materials , and the scanning range should include the main diffraction peak of the sample. Smaller step size and longer scan time of each step made the fitting factor smaller, also the calculated pattern coincided with the measured pattern, better enhance the precision of the analyses.

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On the quantitative phase analysis and amorphous content of triacylglycerols materials by X-ray Rietveld method

Chemistry and Physics of Lipids ◽

10.1016/j.chemphyslip.2018.01.003 ◽

2018 ◽

Vol 212 ◽

pp. 51-60 ◽

Cited By ~ 7

Author(s):

Guilherme A. Calligaris ◽

Thais L.T. da Silva ◽

Ana Paula B. Ribeiro ◽

Adenilson O. dos Santos ◽

Lisandro P. Cardoso

Keyword(s):

Phase Analysis ◽

Rietveld Method ◽

Quantitative Phase Analysis ◽

X Ray ◽

Quantitative Phase ◽

Amorphous Content

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Quantitative Phase Analyses of a Slag Using X-Ray Powder Diffraction

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.881-883.1241 ◽

2014 ◽

Vol 881-883 ◽

pp. 1241-1244

Author(s):

Wei Jin Zeng ◽

Chao Zeng ◽

Wei He

Keyword(s):

Quantitative Analysis ◽

Phase Analysis ◽

Powder Diffraction ◽

Rietveld Method ◽

Quantitative Phase Analysis ◽

Powder Diffraction Data ◽

X Ray ◽

Quantitative Phase ◽

Full Profile ◽

Qualitative Phase

The quantitative phase analyses of a slag have been successfully carried out by using both of the full-profile Rietveld and RIR methods from X-ray powder diffraction data. The qualitative phase analysis indicates that the slag contains mayenite (CaO)12(Al2O3)7, olivine Ca2(SiO4), gehlenite Ca2Al (AlSiO7), lemite Ca2(SiO4) and hibonite CaO(Al2O3)6. The quantitative analysis from Rietveld refinement shows that the weight concentrations of mayenite, olivine, gehlenite, lemite and hibonite for the slag are 48.8(4) wt.%, 32.2(5) wt.%, 11.0(9) wt.%, 6.2(1.1) wt.% and 1.8 (1.2) wt.%, respectively. The quantitative phase analysis results obtained by Rietveld method are more precise then those by RIR method.

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