A new interpretation of the σ A parameter.

Authors :: Carrozzini, B.
Cascarano, G. L.
Giacovazzo, C.
Mazzone, A.
Source :: Acta Crystallographica: Section A (Wiley-Blackwell); Jul2013, Vol. 69 Issue 4, p408-412, 5p, 1 Chart, 3 Graphs
Publication Year :: 2013
Abstract: A new study of the σ <subscript>A</subscript> parameter has been undertaken to understand its behaviour when the diffraction amplitude distributions are far from the standard Wilson distributions. The study has led to the formulation of a new statistical interpretation of σ <subscript>A</subscript>, expressed in terms of a correlation factor. The new formulas allow a more accurate use of σ <subscript>A</subscript> in electron-density modification procedures. [ABSTRACT FROM AUTHOR]