Cr+3 distribution in Al1 and Al2 Sites of alexandrite (BeAl2O4: Cr3+) induced by annealing, investigated by optical spectroscopy

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dc.contributor.authorTrindade, Neilo M. [UNESP]
dc.contributor.authorScalvi, Rosa M. F. [UNESP]
dc.contributor.authorScalvi, Luis Vicente de Andrade [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2016-03-02T12:57:19Z
dc.date.available2016-03-02T12:57:19Z
dc.date.issued2010
dc.description.abstractIn order to investigate optical properties of alexandrite, the present work deals with the influence of thermal annealing on optical absorption and luminescence spectra of natural samples. The exposure time to heat treatment at 1000o C is taken into account. Possible migration of Cr3+ ions from Al1 (inversion site) to Al2 (reflection site) is detected. Sample composition is obtained through Scanning Electron Microscopy (SEM) measurements and points to a rearrangement of Cr+3 and Fe3+ ions in the alexandrite crystalline structure, under thermal annealing influence. This feature may be used to control the optical properties of natural alexandrite, which can be associated to the observed laser emission effect.en
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Física, Faculdade de Ciências de Bauru, Bauru, Av. Luiz Edmundo Carrijo Coube 14-01, Vargem Limpa, CEP 17033360, SP, Brasil
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Física, Faculdade de Ciências de Bauru, Bauru, Av. Luiz Edmundo Carrijo Coube 14-01, Vargem Limpa, CEP 17033360, SP, Brasil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent18-24
dc.identifierhttp://dx.doi.org/10.4236/epe.2010.21004
dc.identifier.citationEnergy and Power Engineering, v. 2, n. 2, p. 18-24, 2010.
dc.identifier.doi10.4236/epe.2010.21004
dc.identifier.issn1947-3818
dc.identifier.lattes1009746638524690
dc.identifier.lattes0492600439402115
dc.identifier.lattes7730719476451232
dc.identifier.orcid0000-0001-5762-6424
dc.identifier.urihttp://hdl.handle.net/11449/134546
dc.language.isoeng
dc.relation.ispartofEnergy and Power Engineering
dc.rights.accessRightsAcesso restrito
dc.sourceCurrículo Lattes
dc.subjectA. oxidesen
dc.subjectD. optical propertiesen
dc.subjectD. defectsen
dc.titleCr+3 distribution in Al1 and Al2 Sites of alexandrite (BeAl2O4: Cr3+) induced by annealing, investigated by optical spectroscopyen
dc.typeArtigo
unesp.author.lattes7730719476451232[3]
unesp.author.orcid0000-0001-5762-6424[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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Bauru - FC - Faculdade de Ciências