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The reference intensity ratio, I / I c , for computer simulated powder patterns
Author(s) -
Hubbard C. R.,
Evans E. H.,
Smith D. K.
Publication year - 1976
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889876010807
Subject(s) - corundum , intensity (physics) , limiting , analytical chemistry (journal) , powder diffraction , materials science , extinction (optical mineralogy) , diffraction , mineralogy , chemistry , optics , crystallography , physics , chromatography , engineering , mechanical engineering
A scale factor γ, to convert from the relative to the absolute/relative intensity scale, is readily calculated during computer simulation of powder patterns. Previously used scale factors are related to γ. The Reference Intensity Ratio, I / I c ( c = corundum), is obtained from μ, ρ, and γ for the sample and for corundum. Comparing calculated and experimental I / I c values confirms that microabsorption and primary extinction can be serious experimental aberrations possibly limiting the accuracy to several wt.% in quantitative analysis by powder diffraction.