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- W3109030382 abstract "Powder diffraction is one of the most widely used analytical techniques for characterizing solid state materials. It can be used for phase or polymorph identification, quantitative analysis, cell parameter determination, or even full crystal structure analysis using the powerful Rietveld refinement method. As with much of modern crystallography, the software used for Rietveld refinement is frequently treated as a “black box” that produces often poorly understood outputs. This paper shows how it is possible for students to perform a full Rietveld refinement against experimental powder diffraction data from scratch using a simple spreadsheet like Excel. It starts by reviewing the basic ideas of least-squares fitting a straight line, develops these into fitting simple functions to peaks in simulated experimental data, and then combines these ideas with crystallographic equations to enable Rietveld refinement of the structure of an inorganic material (rutile, TiO2). At each stage, students can self-learn different fundamental aspects and pitfalls of data analysis that are widely reapplicable. The ideas can be taught as an online learning exercise or could be incorporated in a laboratory class where students collect and analyze their own experimental data." @default.
- W3109030382 created "2020-12-07" @default.
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- W3109030382 date "2020-11-25" @default.
- W3109030382 modified "2023-10-05" @default.
- W3109030382 title "Structure Analysis from Powder Diffraction Data: Rietveld Refinement in Excel" @default.
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- W3109030382 doi "https://doi.org/10.1021/acs.jchemed.0c01016" @default.
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