
%0 Journal Article
%A Ailwood, CR 
%A Fielding, PE 
%T Sulphur-selenium compounds
%J Australian Journal of Chemistry
%D 1969/11/01
%V 22
%N 11
%P 2301-2307
%K 
%R https://doi.org/10.1071/CH9692301
%U https://www.publish.csiro.au/paper/CH9692301 
%X The characterization of various mixtures obtained by fractional recrystallization of sulphur-selenium melts is described. Optical absorption spectra of thin films, mass spectra, and X-ray diffraction data reveal two distinct ranges of homogeneity, the break occurring at 14 at. % Se. The optical absorption edge of crystals containing less than 14 at. % Se varies linearly with composition. A direct optical transition to the conduction band of S8 and a transition due to trapped excitons are thought to contribute to the excessive width of this absorption edge. 
