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This study introduces a simple absorption correction model for powder X-ray diffraction data. The developed software, diffpy.labpdfproc, aids in processing lab-based X-ray experiments for accurate pair distribution functions.

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Area of Science:

  • Materials Science
  • Crystallography
  • Computational Chemistry

Background:

  • Powder X-ray diffraction (XRD) is crucial for materials characterization.
  • Debye-Scherrer geometry is common in laboratory X-ray experiments.
  • Accurate data processing, including absorption correction, is vital for reliable results.

Purpose of the Study:

  • To develop and test a simple absorption correction model for powder XRD data.
  • To improve the preprocessing step for obtaining pair distribution functions (PDFs) using tools like PDFgetX3.
  • To provide a user-friendly software solution for absorption correction in laboratory X-ray experiments.

Main Methods:

  • Exploration of various experimental and theoretical methods for estimating the linear absorption coefficient times radius (μR).
  • Identification of optimal μR values for absorption correction based on capillary diameter and X-ray beam size.
  • Development and testing of the diffpy.labpdfproc software package.

Main Results:

  • Established operational ranges of μR that allow for a reasonable signal-to-noise ratio after correction.
  • Demonstrated the effectiveness of the developed absorption correction model for Debye-Scherrer geometry.
  • Validated the user-friendly nature and rapid calculation capabilities of diffpy.labpdfproc.

Conclusions:

  • The developed absorption correction model is effective for laboratory powder XRD data.
  • The diffpy.labpdfproc software facilitates efficient and accurate data processing.
  • This work enhances the reliability of pair distribution functions derived from experimental XRD data.