The role of rare earth elements and Mn2+ point defects on the luminescence of bavenite

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dc.contributor.authorGarcia-Guinea J.
dc.contributor.authorCorrecher V.
dc.contributor.authorQuejido A.
dc.contributor.authorLaiglesia A.
dc.contributor.authorCan N.
dc.date.accessioned2024-07-22T08:24:07Z
dc.date.available2024-07-22T08:24:07Z
dc.date.issued2005
dc.description.abstractNatural fibrous crystals of bavenite (Ca4Be2Al 2Si9O26(OH)2) collected in intra-granitic pegmatite bodies of Bustarviejo (Madrid, Spain) have been examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron microprobe (EMPA) and inductively coupled plasma-mass spectrometry (ICP-MS). The strong luminescence emissions of bavenite using thermoluminescence (TL), cathodoluminescence (CL) and its thermal stability have been recorded, looking for new physical properties and new phosphor or dosimetric uses. The bavenite luminescence takes place in the 5d electron shell that interacts strongly with the crystal field; the spectra bands assignment are Gd 3+ (319 nm), Sm3+ (562 and 594 nm), Dy3+ (572 nm) and Tb3+ (495 nm). A Mn2+ band at about 578 nm in Ca2+ sites is present as a broad band that overlaps with the Dy 3+, Sm3+ and Tb3+ bands. Mn2+ is a transition metal ion that has an electron configuration of 3d5 and interacts strongly with the crystal field (d → d) transition. Stability tests at different temperatures show clearly that the TL glow curves at 400 nm in both irradiated and non-irradiated bavenite samples track the typical pattern of a system produced by a continuous trap distribution. The ICP-MS analyses show concentrations of Yb = 29.7 ppm, Dy = 22.7 ppm, Sm = 9.45 ppm, Nd = 8.95 ppm and Gd = 8.15 ppm in the bavenite lattice. © 2004 Elsevier B.V. All rights reserved.
dc.identifier.DOI-ID10.1016/j.talanta.2004.05.016
dc.identifier.issn00399140
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/19840
dc.language.isoEnglish
dc.publisherElsevier
dc.subjectCrystals
dc.subjectManganese
dc.subjectMass spectrometry
dc.subjectPoint defects
dc.subjectScanning electron microscopy
dc.subjectThermodynamic stability
dc.subjectThermoluminescence
dc.subjectX ray diffraction
dc.subjectcalcium ion
dc.subjectdysprosium
dc.subjectgadolinium
dc.subjectlanthanide
dc.subjectmanganese
dc.subjectphosphorus
dc.subjectsamarium
dc.subjectterbium
dc.subjectCathodoluminescnece (CL)
dc.subjectContinuous trap distribution
dc.subjectElectron configuration
dc.subjectSpectra bands
dc.subjectarticle
dc.subjectconcentration (parameters)
dc.subjectdosimetry
dc.subjectelectron
dc.subjectelectron probe microanalysis
dc.subjectmass spectrometry
dc.subjectsample
dc.subjectscanning electron microscopy
dc.subjecttemperature measurement
dc.subjectthermoluminescence
dc.subjectthermostability
dc.subjectX ray diffraction
dc.subjectRare earth elements
dc.titleThe role of rare earth elements and Mn2+ point defects on the luminescence of bavenite
dc.typeArticle

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