Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/105243
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dc.contributor.authorCosta, Benilde F. O.-
dc.contributor.authorAlves, Eduardo Ivo-
dc.contributor.authorSilva, Pedro A. O. C.-
dc.contributor.authorBatista, António C.-
dc.date.accessioned2023-02-10T11:05:40Z-
dc.date.available2023-02-10T11:05:40Z-
dc.date.issued2021-
dc.identifier.issn2075-163X-
dc.identifier.urihttps://hdl.handle.net/10316/105243-
dc.description.abstractThis review presents studies on iron meteorites (Campo del Cielo fall and an unregistered iron meteorite), an unregistered stony meteorite from Northwest Africa, and 13 tektites from the American, European, and Australasian strewn fields. The main experimental technique used in the studies was Mössbauer spectroscopy, both in transmission and backscattering geometries. For the latter, a MIMOS II spectrometer was used. Additionally, optical and scanning electron microscopies and X-ray diffraction were used. In the studied iron meteorites, kamacite is found as the main mineral. Campo del Cielo meteorite exhibitsWidmanstätten patterns and schreibersite inclusions. The unregistered iron meteorite has Neumann lines and schreibersite inclusions. We have assigned Campo del Cielo as an octahedrite and the unregistered iron meteorite as a hexahedrite. The unregistered stony meteorite is composed mainly of iron-free silicates; at 4.2 K, the spectrum indicates maghemite and 1% troilite. The Cambodian tektite appeared individualized from other australasites, unlike the moldavite, which tends to cluster with them. Our analyses do not allow dismissing doubts on the provenance of tibetanites. The Fe3+/Fe2+ ratio was found to be higher for Muong Nong-type tektites than for splash-form tektites, as expected from their morphology and solidification from melt at lower temperature.pt
dc.language.isoengpt
dc.publisherMDPI AGpt
dc.relationUIDB/04564/2020pt
dc.relationUIDP/04564/2020pt
dc.relationUID/00611/2020pt
dc.relationQREN-Mais Centro Project No. ICT_2009_02_012_1890pt
dc.rightsopenAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt
dc.subjectmeteoritespt
dc.subjecttektitespt
dc.subjectMössbauer spectroscopypt
dc.title57Fe Mössbauer Analysis of Meteorites and Tektitespt
dc.typearticlept
degois.publication.firstPage628pt
degois.publication.issue6pt
degois.publication.titleMineralspt
dc.peerreviewedyespt
dc.identifier.doi10.3390/min11060628-
degois.publication.volume11pt
dc.date.embargo2021-01-01*
uc.date.periodoEmbargo0pt
item.cerifentitytypePublications-
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypearticle-
crisitem.author.researchunitCentre for Earth and Space Research of the University of Coimbra-
crisitem.author.researchunitCFisUC – Center for Physics of the University of Coimbra-
crisitem.author.orcid0000-0003-4258-588X-
crisitem.author.orcid0000-0001-6336-6139-
Appears in Collections:I&D CFis - Artigos em Revistas Internacionais
FCTUC Física - Artigos em Revistas Internacionais
FCTUC Ciências da Terra - Artigos em Revistas Internacionais
LIBPhys - Artigos em Revistas Internacionais
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