A structural study of Y 2O 3Al 2O 3SiO 2 glass employing partial RDFs obtained by anomalous scattering

Abstract

A structural study of Y 2O 3Al 2O 3SiO 2 glass has been performed using the partial radial distribution function (RDF) obtained by anomalous scattering at the Y absorption edge. The partial RDF consists of contributions from atom pairs, such as YO, YM(Si, Al) and YY, related to the local arrangements around the Y atoms, while those of all of the constituent atom-pairs are convoluted into the ordinary RDF. The M(Si, Al)O, YO, MM, YM, and YY interatomic distances and the coordination numbers around the Al and Y atoms are obtained from the two RDFs. The local structures around the Al and Y atoms in the glass are discussed.