From average to local structure: a Rietveld and an atomic pair distribution function (PDF) study of selenium clusters in zeolite-NdY.
The structure of Se particles in the approximately 13 A diameter alpha-cages of zeolite NdY has been determined by Rietveld refinement and pair distribution function (PDF) analysis of X-ray data. With the diffuse scattering subtracted an average structure comprised of an undistorted framework containing nanoclusters of 20 Se atoms is observed. The intracluster correlations and the cluster-framework correlations which give rise to diffuse scattering were modeled by using PDF analysis.
Abeykoon
A M Milinda
AM
Department of Physics, University of Houston, Houston, Texas 77204, USA. aabeykoon@uh.edu
Donner
Wolfgang
W
Brunelli
Michela
M
Castro-Colin
Miguel
M
Jacobson
Allan J
AJ
Moss
Simon C
SC