Topochemically Reduced Iridium Oxides
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 two novel iridium-containing oxide phases containing iridium in extremely low oxidation states; specifically the Ir2+ phase LaSr3CoIrO6 (prepared by the reduction of the novel phase LaSr3CoIrO8)and the Ir2+/3+ phase CaMn0.5Ir0.5O2.125 (via the reduction CaMn0.5Ir0.5O3). We propose to collect neutron powder diffraction data from these reduced phases, and the novel unreduced starting materials, to accurately determine their structures. In the case of the reduced phases we wish to determine if these novel compounds are vacant oxides (e.g. LaSr3CoIrO6) or oxide-hydrides (e.g. LaSr3CoIrO6H2). In addition we wish to collect low temperature neutron diffraction data to determine the nature of the ordered magnetic states these phases adopt.
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Michael A Hayward; JIN Lun; PAGE Jacob and SUARD Emmanuelle. (2018). Topochemically Reduced Iridium Oxides. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-23-704
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