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Superstructure of mullite-type KAl 9 O 14

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dc.contributor.authorLazic, Biljana
dc.contributor.authorKruger, Hannes
dc.contributor.authorKaindl, Reinhard
dc.contributor.authorPerfler, Lukas
dc.contributor.authorKremenović, Aleksandar
dc.contributor.authorCvetković, Vladica
dc.contributor.authorWithers, Raymond
dc.date.accessioned2015-12-10T23:07:53Z
dc.date.issued2013
dc.date.updated2016-02-24T10:45:15Z
dc.description.abstractLarge whiskers of a new KAl9O14 polymorph with mullite-type structure were synthesized. The chemical composition of the crystals was confirmed by energy-dispersive X-ray spectroscopy, and the structure was determined using single-crystal X-ray diffraction. Nanosized twin domains and one-dimensional diffuse scattering were observed utilizing transmission electron microscopy. The compound crystallizes in space group P21/n (a = 8.1880(8), b = 7.6760(7), c = 8.7944(9) Å, β = 110.570(8), V = 517.50(9) Å3, Z = 2). Crystals of KAl 9O14 exhibit a mullite-type structure with linear edge-sharing AlO6 octahedral chains connected with groups of two AlO4 tetrahedra and one AlO5 trigonal bipyramid. Additionally, disproportionation of KAl9O14 into K β-alumina and corundum was observed using in situ high-temperature optical microscopy and Raman spectroscopy.
dc.identifier.issn0897-4756
dc.identifier.urihttp://hdl.handle.net/1885/63052
dc.publisherAmerican Chemical Society
dc.sourceChemistry of Materials
dc.subjectKeywords: Chemical compositions; Diffuse scattering; Disproportionations; Edge sharing; Energy dispersive x-ray spectroscopy; High-temperature optical microscopies; mullite-type; Octahedral chains; Single crystal x-ray diffraction; Space Groups; superstructure; Twi diffuse scattering; mullite-type; stacking faults; superstructure; whiskers
dc.titleSuperstructure of mullite-type KAl 9 O 14
dc.typeJournal article
local.bibliographicCitation.issue3
local.bibliographicCitation.lastpage502
local.bibliographicCitation.startpage496
local.contributor.affiliationLazic, Biljana, University of Bern
local.contributor.affiliationKruger, Hannes, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKaindl, Reinhard, University of Innsbruck
local.contributor.affiliationPerfler, Lukas, University of Innsbruck
local.contributor.affiliationKremenović, Aleksandar, University of Belgrade
local.contributor.affiliationCvetković, Vladica, University of Belgrade
local.contributor.affiliationWithers, Raymond, College of Physical and Mathematical Sciences, ANU
local.contributor.authoruidKruger, Hannes, u4834990
local.contributor.authoruidWithers, Raymond, u8600734
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor030206 - Solid State Chemistry
local.identifier.absseo970103 - Expanding Knowledge in the Chemical Sciences
local.identifier.ariespublicationU4217927xPUB764
local.identifier.citationvolume25
local.identifier.doi10.1021/cm3038476
local.identifier.scopusID2-s2.0-84873685356
local.identifier.thomsonID000315018500028
local.type.statusPublished Version

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