Understanding FWHM in XRD Analysis of Powder Patterns

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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