Understanding FWHM in XRD Analysis of Powder Patterns

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Discussion Overview

The discussion centers on the use of Full Width at Half Maximum (FWHM) in X-ray Diffraction (XRD) analysis of powder patterns, specifically exploring the rationale behind using FWHM for calculations instead of peak height.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions the rationale for using FWHM in calculations, seeking clarification on its significance compared to peak height.
  • Another participant explains that peak height measures the height of the distribution, while FWHM provides a measure of the width of the distribution.
  • A subsequent participant asks for specific examples of calculations that utilize FWHM, indicating a desire for practical applications of the concept.

Areas of Agreement / Disagreement

Participants appear to have differing views on the importance of FWHM versus peak height, with some seeking clarification and examples while others provide explanations. The discussion remains unresolved regarding the specific calculations that necessitate the use of FWHM.

Contextual Notes

There are limitations in the discussion regarding the types of calculations referenced and the assumptions underlying the use of FWHM versus peak height, which remain unspecified.

VASUbhagwat
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Why is FWHM taken for calculations in XRD analysis of powder pattern? I mean, why don't we take the full peak value?
 
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They are two different things. The peak value gives you the height of the distribution. The FWHM gives you a measure of the width of the distribution.
 
Thanks a ton for your reply . But what i want to know is why do we take the width for calculations and not the height
 
For what kind of calculations? Can you give an example?
 

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