Complex Ruthenium-Containing Oxide and Oxide-Hydride Phases
Transition metal oxides have been of enduring interest due to the wide variety of complex electronic behaviour they can exhibit. Topochemical reduction offers the opportunity to prepare novel transition metal oxide systems containing transition metal cations in novel oxidation states and/or coordination geometries. Using this approach we have prepared a series of novel reduced oxides and oxide-hydride phases containing ruthenium and cobalt or nickel in extremely low oxidation states. Specifically we have reduced LaSr3NiRuO8, first to the Ni1+, Ru2+ oxide LaSr3NiRuO6 and then to the iso-valent oxide-hydride LaSr3NiRuO4H4. X-ray diffraction data suggest a structure which contains infinite Ni/RuH2 sheets, analogous to the CuO2 sheets present in high Tc superconductors. Following this we have also prepared the analogous cobalt phases LaSr3CoRuO8, LaSr3CoRuO6 and LaSr3CoRuO4H4. We propose to collect neutron powder diffraction data from all of these phases to accurately characterise the anion lattices of these systems, and low temperature neutron diffraction data to determine the ordered magnetic states they adopt.
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Michael A Hayward; JIN Lun; PAGE Jacob and SUARD Emmanuelle. (2018). Complex Ruthenium-Containing Oxide and Oxide-Hydride Phases. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-23-703