Rietveld refinement programs based on the Fundamental Parameters Approach (FPA) calculate the peak shape from the configuration of the optical elements in the beam path. In this episode we learn how to create instrument configuration files for custom instrument setups in Profex.
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https://www.youtube.com/watch?v=KwT3OzhSTGk
Lesson 3 of the Profex workshop at the Forschungszentrum Jülich, Germany, in March 2024 summarizes the concept of Rietveld refinement.
Slides and example files are avialable for download on
https://www.profex-xrd.org
Profex workshops are kindly supported by RMS Foundation, Switzerland:
https://www.rms-foundation.ch
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https://www.youtube.com/watch?v=l_Lk-zbnmSE
Lesson 7 of the Profex workshop at the Forschungszentrum Jülich, Germany, in March 2024 processes and optimizes a refinement from start to end, including refinement of profile parameters and site occupancy factors (substitutions). In the second example, a custom instrument configuration is created.
Slides and example files are avialable for download on
https://www.profex-xrd.org
Profex workshops are kindly supported by RMS Foundation, Switzerland:
https://www.rms-foundation.ch
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https://www.youtube.com/watch?v=wkprPdzN2uE
Bimodal crystallite size distributions can be refined with BGMN's subphase feature. Profex has a predefined text block to activate the feature.
Profex website:
https://www.profex-xrd.org
BGMN variable documentation:
http://www.bgmn.de/variables.html
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https://www.youtube.com/watch?v=sPPWW9Kjo_s
A sequential batch refinement uses the results of a refinement project as input files for the next project. This way, high-temperature or high-pressure measurement series can be refined.
Visit the Profex website:
https://www.profex-xrd.org
Profex Tutorials on Odysee:
https://odysee.com/@ProfexTutorials:2
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https://www.youtube.com/watch?v=F5kBvTHt2ng
In part 1 of this case study I am creating a Profex instrument configuration for a PANalytical Empyrean diffractometer.
01:22 Creating the refinement project
03:24 Adapting the instrument configuration
14:39 Changing the radiation spectrum
20:53 Saving the configuration to the device repository
Visit the Profex website:
https://www.profex-xrd.org
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https://www.youtube.com/watch?v=ZO_LmaShrAw
The new Scan Tracer dialog in Profex 4.3.3 allows to digitize XRD scans from pixel images, for example from figures in publications. This video explains how the dialog is used.
Visit the Profex website:
https://www.profex-xrd.org
Profex tutorials on Odysee:
https://odysee.com/@ProfexTutorials:2
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https://www.youtube.com/watch?v=rP0-yrFVIKg
Profex allows to calculate the absorption coefficients of phases and samples for characteristic X-radiation. This can be used to estimate the penetration depth of the radiation in the sample and to get an idea of which surface layer the measured signal represents.
Visit the Profex website:
https://www.profex-xrd.org
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https://www.youtube.com/watch?v=2NzFqt7rbZI