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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorTrindade, Neilo M.
dc.creatorScalvi, Rosa M. F.
dc.creatorScalvi, Luis Vicente de Andrade
dc.date2016-03-02T12:57:19Z
dc.date2016-10-25T21:30:38Z
dc.date2016-03-02T12:57:19Z
dc.date2016-10-25T21:30:38Z
dc.date2010
dc.date.accessioned2017-04-06T09:56:37Z
dc.date.available2017-04-06T09:56:37Z
dc.identifierEnergy and Power Engineering, v. 2, n. 2, p. 18-24, 2010.
dc.identifier1947-3818
dc.identifierhttp://hdl.handle.net/11449/134546
dc.identifierhttp://acervodigital.unesp.br/handle/11449/134546
dc.identifier10.4236/epe.2010.21004
dc.identifier7730719476451232
dc.identifier1009746638524690
dc.identifier0492600439402115
dc.identifierhttp://dx.doi.org/10.4236/epe.2010.21004
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/945057
dc.descriptionIn 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.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageeng
dc.relationEnergy and Power Engineering
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectA. oxides
dc.subjectD. optical properties
dc.subjectD. defects
dc.titleCr+3 distribution in Al1 and Al2 Sites of alexandrite (BeAl2O4: Cr3+) induced by annealing, investigated by optical spectroscopy
dc.typeOtro


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