Bismuth Ruthenium Oxides. Neutron Diffraction and Photoelectron Spectroscopic Study of Bi₂Ru₂O₇ and Bi₃Ru₃O₁₁

Abstract

The structures of Bi₃Ru₃O₁₁, a = 9.3050(2)Ǻ, Pn3, and Bi₂Ru₂O₇, a = 10.2957(1)Ǻ, Fd3m, have been redetermined by Rietveld analysis of powder neutron diffraction data. For both compounds there is no evidence for appreciable oxygen non- stoichiometry . X-Ray photoelectron spectra of both compounds show unusual line shapes. In the case of Bi₃Ru₃O₁₁ this is a result of the mixed valency and surface oxidation. In Bi₂Ru₂O₇ final state effects appear to be important.