Phenomenological model of anisotropic peak broadening in powder diffraction

被引：1139

作者：

Stephens, PW ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Upton, NY 11973 USA

[2] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

来源：

JOURNAL OF APPLIED CRYSTALLOGRAPHY | 1999年 / 32卷

关键词：

D O I：

10.1107/S0021889898006001

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Anisotropic line-shape broadening (peak width which is not a smooth function of d-spacing) is frequently observed in powder diffraction patterns, and can be a source of considerable difficulty for whole-pattern fitting or Rietveld analysis. A model of the multi-dimensional distribution of lattice metrics within a powder sample is developed, leading naturally to a few parameters which can be varied to achieve optimal line-shape fits. Conditions on these parameters are derived for all crystal systems, and the method is illustrated with two examples: sodium p-hydroxybenzoate and rubidium fulleride.

引用

页码：281 / 289

页数：9

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