Low pressure synchrotron x-ray powder diffraction of Cu5-xMxSbO6 (M=Cr, Mn, W)

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dc.contributor.authorWilson, DJen_AU
dc.contributor.authorSöhnel, Ten_AU
dc.contributor.authorSmith, KLen_AU
dc.contributor.authorBrand, HEAen_AU
dc.contributor.authorUlrich, Cen_AU
dc.contributor.authorGraham, PJen_AU
dc.contributor.authorChang, FFen_AU
dc.contributor.authorAllison, MCen_AU
dc.contributor.authorVyborna, NHen_AU
dc.date.accessioned2021-10-14T04:00:49Zen_AU
dc.date.available2021-10-14T04:00:49Zen_AU
dc.date.issued2016-02-04en_AU
dc.date.statistics2021-09-23en_AU
dc.description.abstractThe large crystallographic and chemical diversity of copper-based metal oxides is one of their highlighting features and cause for pursuit into copper based material research. An interesting feature seen in copper based metal oxides is the coexistence of different copper oxidation states, in different crystallographic positions, within the same compound. This can lead to a mixture of magnetically active Cu2+ and magnetically inactive Cu1+ within the same compound, with different structural motifs. One interesting compound that demonstrates this coexistence of mixed copper oxidation states is Cu5SbO6, which crystallises in a modified delafossite structure type (CuFeO2). Here, the magnetically active brucite-like CuO2 layer was diluted in an ordered fashion with non-magnetic Sb5+. These layers were separated by linearly coordinated, magnetically inactive Cu1+. Rietveld refinements on a range of preparation temperatures revealed a low-temperature (LT) and high-temperature modification (HT) phase transition. This is related to an ordering (HT)/disordering (LT) effect of the Sb5+/Cu2+ brucite-like layers between the Cu1+ ions. Substituting the Cu2+ or Sb5+ in the layers with other transition metals (Cr, Mn, W) could present interesting changes to the properties of the material, and potentially influence the ordered/disordered stacking of the layers. By using solid-state Raman spectroscopy, we could show that this structure displayed a pressure-induced phase transition at room temperature for the ordered modification, which was not observed for the disordered modification. Lowering the pressure from ambient down to 20 mbar showed phonon modes at about 700 cm-1 and 550 cm-1 disappeared almost completely. Neutron powder diffraction experiments were conducted at atmospheric and low pressure on both ordered and disordered modifications. On analysis of the neutron diffraction patterns, we could show a very small shift in the reflections, and thus changes in the unit cell parameters, for the ordered modification, while these shifts were not observed for the disordered modification. These shifts should also be observed in synchrotron powder diffraction patterns. Therefore, we investigated the nature of this phase transition with variable pressure synchrotron X-ray powder diffraction.en_AU
dc.identifier.citationWilson, D. J., Söhnel, T., Smith, K., Brand, H., Ulrich, C., Graham, P., Chang, F., Allison, M., & Vyborna, N. H. (2016). Low pressure synchrotron x-ray powder diffraction of Cu5-xMxSbO6 (M=Cr, Mn, W). Poster presented to the 40th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, 2nd February – 5th February, 2016, (pp. 114-115). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2016/Wagga_2016_Conference_Handbook.pdfen_AU
dc.identifier.conferenceenddate5 February 2016en_AU
dc.identifier.conferencename40th Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate2 February 2016en_AU
dc.identifier.isbn978-0-646-96433-1en_AU
dc.identifier.otherTP7en_AU
dc.identifier.pagination114-115en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2016/Wagga_2016_Conference_Handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11957en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectBremsstrahlungen_AU
dc.subjectCharged particlesen_AU
dc.subjectChemical reactionsen_AU
dc.subjectCoherent scatteringen_AU
dc.subjectDiffractionen_AU
dc.subjectElectromagnetic radiationen_AU
dc.subjectElementsen_AU
dc.subjectIonsen_AU
dc.subjectLaser spectroscopyen_AU
dc.subjectMetalsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectRadiationsen_AU
dc.subjectScatteringen_AU
dc.subjectSpectroscopyen_AU
dc.subjectTransition elementsen_AU
dc.titleLow pressure synchrotron x-ray powder diffraction of Cu5-xMxSbO6 (M=Cr, Mn, W)en_AU
dc.typeConference Posteren_AU
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