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dc.contributor.authorMorán Ruiz, Aroa
dc.contributor.authorWain Martin, Aritza ORCID
dc.contributor.authorOrera Utrilla, Alodia
dc.contributor.authorSanjuán, María Luisa
dc.contributor.authorLarrañaga Varga, Aitor ORCID
dc.contributor.authorSlater, Peter R.
dc.contributor.authorArriortua Marcaida, María Isabel ORCID
dc.identifier.citationIUCRJ 6(1) : 128-135 (2019)es_ES
dc.description.abstractThe first fluorination of the cuspidine-related phases of Ln4(Al2O7□)O2 (where Ln = Sm, Eu, Gd) is reported. A low-temperature reaction with poly(vinyl­idene difluoride) lead to the fluorine being substituted in place of oxygen and inserted into the vacant position between the dialuminate groups. X-ray photoelectron spectroscopy shows the presence of the F 1s photoelectron together with an increase in Al 2p and rare-earth 4d binding energies supporting F incorporation. Energy-dispersive X-ray spectroscopy analyses are consistent with the formula Ln4(Al2O6F2)O2, confirming that substitution of one oxygen by two fluoride atoms has been achieved. Rietveld refinements show an expansion in the cell upon fluorination and confirm that the incorporation of fluoride in the Ln4(Al2O7□)O2 structure results in changes in Al coordination from four to five. Thus, the isolated tetrahedral dialuminate Al2O7 groups are converted to chains of distorted square-based pyramids. These structural results are also discussed based on Raman spectra.es_ES
dc.description.sponsorshipThis research was funded by the Ministerio de Economía, Industria y Competitividad (MAT2016-76739-R) (AEI/FEDER, UE), and Departamento de Educación of the Basque Government (IT-630–13). The authors thank SGIker of UPV/EHU for technical and personnel support. A. Morán-Ruiz thanks UPV/EHU for funding.es_ES
dc.publisherInternational Union of Crystallographyes_ES
dc.subjectcuspidine-type rare-earth aluminateses_ES
dc.subjectX-ray diffractiones_ES
dc.subjectpoly(vinyl­idene difluoride)es_ES
dc.subjectRaman spectroscopyes_ES
dc.titleSynthesis of new Ln4(Al2O6F2)O2 (Ln = Sm,Eu,Gd) phases with a cuspidine-related structurees_ES
dc.rights.holderAttribution 4.0 International (CC BY 4.0)es_ES
dc.rights.holderAtribución 3.0 España*

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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)