Difference between revisions of "Bragg R factor"

From Online Dictionary of Crystallography

(Added German and Spanish translations (U. Mueller))
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<font color="red">Bragg-''R''-Wert</font> (''Ge''). <font color="green">Factor ''R'' de Bragg</font> (''Sp'').
== Definition ==
== Definition ==

Latest revision as of 16:06, 9 November 2017

Bragg-R-Wert (Ge). Factor R de Bragg (Sp).


The R factor measuring the agreement between the reflection intensities calculated from a crystallographic model and those measured experimentally.

[math]R_B = {{\sum | I_{obs} - I_{calc} | } \over {\sum |I_{obs} |}}[/math].

In the Rietveld method RB is useful because it depends on the fit of the structural parameters and not on the profile parameters.