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A universally applicable composite modulated structure approach to ordered BaxMyTi8−yO16 hollandite-type solid solutions

Carter, Melody; Withers, Raymond

Description

A wide range of barium titanate hollandites of the form Bax2+Mx2+Ti8-x4+O16 (M=Zn, Co, Mg, Fe and Mn) and Bax2+M2x3+Ti8-2x4+O16 (M=Fe) with nominal x ranging from 1.0 to 1.4 have been synthesized and examined to investigate the solid solution range and the nature of the ordering of the Ba ions. Electron diffraction studies confirm that the barium titanate hollandites are composite modulated single phase solid solutions made up of mutually incommensurable (along b) framework and Ba ion...[Show more]

dc.contributor.authorCarter, Melody
dc.contributor.authorWithers, Raymond
dc.date.accessioned2015-12-13T22:53:09Z
dc.identifier.issn0022-4596
dc.identifier.urihttp://hdl.handle.net/1885/81688
dc.description.abstractA wide range of barium titanate hollandites of the form Bax2+Mx2+Ti8-x4+O16 (M=Zn, Co, Mg, Fe and Mn) and Bax2+M2x3+Ti8-2x4+O16 (M=Fe) with nominal x ranging from 1.0 to 1.4 have been synthesized and examined to investigate the solid solution range and the nature of the ordering of the Ba ions. Electron diffraction studies confirm that the barium titanate hollandites are composite modulated single phase solid solutions made up of mutually incommensurable (along b) framework and Ba ion sub-structures. The overall superspace group symmetry was found to be I′2/m(0,x2,0)1. The symbol I′ here refers to the superspace centering operation. (see below). Both the framework and the Ba sub-structures have the same I2/m average structure space group symmetry. The solid solution ranges for the hollandites were calculated from the positions of well-defined superlattice peaks in X-ray diffraction patterns. The effect of cooling rate on Ba ion ordering is also examined.
dc.publisherAcademic Press
dc.sourceJournal of Solid State Chemistry
dc.subjectKeywords: Cooling; Crystal structure; Electron diffraction; Solid solutions; Stoichiometry; Superlattices; Synthesis (chemical); X ray diffraction analysis; Composite modulated structure; Hollandite; Solid solution range; Tunnel ions; Barium compounds Composite modulated structure; Electron diffraction; Hollandite; Solid solution range
dc.titleA universally applicable composite modulated structure approach to ordered BaxMyTi8−yO16 hollandite-type solid solutions
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume178
dc.date.issued2005
local.identifier.absfor030206 - Solid State Chemistry
local.identifier.absfor091201 - Ceramics
local.identifier.ariespublicationMigratedxPub9989
local.type.statusPublished Version
local.contributor.affiliationCarter, Melody, Australian Nuclear Science and Technology Organisation
local.contributor.affiliationWithers, Raymond, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage1903
local.bibliographicCitation.lastpage1914
local.identifier.doi10.1016/j.jssc.2005.03.040
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2015-12-11T10:54:46Z
local.identifier.scopusID2-s2.0-19444382066
CollectionsANU Research Publications

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