Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/91164
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dc.contributor.authorMaksimova, A A-
dc.contributor.authorPetrova, E V-
dc.contributor.authorChukin, A V-
dc.contributor.authorKarabanalov, M S-
dc.contributor.authorNogueira, Bernardo A-
dc.contributor.authorRui Fausto-
dc.contributor.authorYesiltas, M-
dc.contributor.authorFelner, I-
dc.contributor.authorOshtrakh, M I-
dc.date.accessioned2020-10-10T16:38:51Z-
dc.date.available2020-10-10T16:38:51Z-
dc.date.issued2020-12-05-
dc.identifier.issn13861425pt
dc.identifier.urihttp://hdl.handle.net/10316/91164-
dc.description.abstractThe bulk interior of Kemer L4 ordinary chondrite was characterized for the first time by means of optical microscopy, scanning electron microscopy with energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopy with a high velocity resolution. The main and minor iron-bearing phases were found as well as ferrihydrite as a result of weathering. The Fe2+ partitioning among the M1 and M2 sites in olivine, orthopyroxene and clinopyroxene was determined from the X-ray diffraction. The ratios of Fe2+ occupancies for these crystals were estimated from both X-ray diffraction and Mössbauer spectroscopy data and appeared to be in a good agreement. The distribution coefficients KD and the temperatures of equilibrium cation distribution Teq were also evaluated for olivine and orthopyroxene from two independent techniques and were in a good consistence: KD = 1.77, Teq = 441 K (X-ray diffraction) and KD = 1.77, Teq = 439 K (Mössbauer spectroscopy) for olivine and KD = 0.10, Teq = 806 K (X-ray diffraction) and KD = 0.09, Teq = 787 K (Mössbauer spectroscopy) for orthopyroxene. The fusion crust of Kemer L4 was studied using X-ray diffraction, magnetization measurements and Mössbauer spectroscopy. Magnesioferrite and probably maghemite were found in the fusion crust in addition to other phases observed in the bulk interior.pt
dc.language.isoengpt
dc.publisherElsevierpt
dc.relationinfo:eu-repo/grantAgreement/FCT/UI0313/QUI/2020/PTpt
dc.rightsembargoedAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt
dc.subjectKemer L4 ordinary chondritept
dc.subjectX-ray diffractionpt
dc.subjectRaman spectroscopypt
dc.subjectMagnetization measurementpt
dc.subjectMössbauer spectroscopypt
dc.titleCharacterization of Kemer L4 meteorite using Raman spectroscopy, X-ray diffraction, magnetization measurements and Mössbauer spectroscopypt
dc.typearticle-
degois.publication.firstPagee118723pt
degois.publication.titleSpectrochimica acta. Part A, Molecular and Biomolecular Spectroscopypt
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S1386142520307022pt
dc.peerreviewedyespt
dc.identifier.doi10.1016/j.saa.2020.118723pt
degois.publication.volume242pt
dc.date.embargo2021-12-05*
uc.date.periodoEmbargo365pt
item.grantfulltextembargo_20211205-
item.languageiso639-1en-
item.fulltextCom Texto completo-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0002-8264-6854-
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais
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