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dc.contributor.authorStimpson, Laura
dc.contributor.authorMcNulty, Jason Allan
dc.contributor.authorMorrison, Finlay D.
dc.contributor.authorMahjan, Amit
dc.contributor.authorMcCabe, Emma
dc.contributor.authorGibbs, Alexandra
dc.contributor.authorStenning, Gavin
dc.contributor.authorJura, Marek
dc.contributor.authorArnold, Donna
dc.identifier.citationStimpson , L , McNulty , J A , Morrison , F D , Mahjan , A , McCabe , E , Gibbs , A , Stenning , G , Jura , M & Arnold , D 2020 , ' A comprehensive variable temperature study of the layered oxide, Ca 2 Mn 3 O 8 ' , Journal of Alloys and Compounds , vol. 843 , 155633 .
dc.identifier.otherPURE: 268490288
dc.identifier.otherPURE UUID: 6d3ffb40-14e3-4b6d-9e95-82f4ecf44dea
dc.identifier.otherORCID: /0000-0002-2813-3142/work/76776300
dc.identifier.otherScopus: 85087429146
dc.identifier.otherWOS: 000554898300015
dc.descriptionThe authors acknowledge the ISIS Neutron and Muon User Source for access to beamtime on HRPD (RB1520166 and RB1720182) [39,40]. We are also thankful for access to the instrumentation in the ISIS Materials Characterisation laboratory. We are grateful to Professor Mike Reece at Queen Mary University London for access to the spark plasma sintering (SPS) instrumentation and for assistance preparing pellets. LJV and JAM are grateful for the award of EPSRC DTA studentships.en
dc.description.abstractCa2Mn3O8 forms a delafossite-related layered structure, which crystallises with monoclinic C2/m symmetry. Compared with the delafossite-structure, the MnO6 layers in Ca2Mn3O8 exhibit an ordered cation void which forms a magnetic ‘bow-tie’ like connectivity of Mn4+ ion layers separated by Ca2+ ions. In-situ variable temperature diffraction data demonstrates that the structure is robust up to a temperature of approximately 1173 K before the material decomposes into the perovskite, CaMnO3 and marokite, CaMn2O4 phases. Simultaneous thermal analysis suggests that a very small amount of water remains within the layers post synthesis. Impedance spectroscopy indicates that Ca2Mn3O8 is an electronic conductor in the range ∼400–700 K with an activation energy of 0.50 ± 0.01 eV.
dc.relation.ispartofJournal of Alloys and Compoundsen
dc.rightsCopyright © 2020 Elsevier B.V. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectLayered oxidesen
dc.subjectNeutron diffractionen
dc.subjectElectronic measurementsen
dc.subjectQD Chemistryen
dc.titleA comprehensive variable temperature study of the layered oxide, Ca2Mn3O8en
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.description.statusPeer revieweden

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