The effect of thermal treatment on the 57Fe Mössbauer spectrum of beryl.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorCosta, Geraldo Magela da-
Autor(es): dc.creatorPolli, Gabriel de Oliveira-
Autor(es): dc.creatorKahwage, Márcio A.-
Autor(es): dc.creatorGrave, Eddy De-
Autor(es): dc.creatorSabioni, Antônio Claret Soares-
Autor(es): dc.creatorMendes, Julio Cesar-
Data de aceite: dc.date.accessioned2025-08-21T15:19:59Z-
Data de disponibilização: dc.date.available2025-08-21T15:19:59Z-
Data de envio: dc.date.issued2017-03-08-
Data de envio: dc.date.issued2017-03-08-
Data de envio: dc.date.issued2006-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/7331-
Fonte completa do material: dc.identifierhttps://link.springer.com/article/10.1007%2Fs00269-006-0064-3-
Fonte completa do material: dc.identifierhttps://doi.org/10.1007/s00269-006-0064-3-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1010795-
Descrição: dc.descriptionMo¨ssbauer spectra (MS) of blue, green and yellow beryl (ideally Be3Al2Si6O18) containing approximately 1% of iron were obtained at 295 and 500 K. Room temperature (RT) spectra of both blue and green samples showed the presence of an asymmetric Fe2+ doublet (DEQ 2.7 mm/s, d 1.1 mm/s), with a very broad low-velocity peak. There is no clear evidence for the presence of a ferric component. The MS of the yellow sample at RT consists of an intense central absorption with parameters typical for Fe3+ (DEQ 0.4 mm/s, d 0.29 mm/s), plus an apparently symmetrical Fe2+ doublet. This sample acquires a lightblue shade upon heating in air at about 620 K. Thermal treatments at high temperatures caused no significant changes in the MS, but the green and yellow beryl acquire a blue colour. All these results are interpreted in relation to the existence of channel water and the distribution of iron among the available crystallographic sites.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectBeryl-
Palavras-chave: dc.subjectThermal treatment-
Palavras-chave: dc.subjectMössbauer spectroscopy-
Título: dc.titleThe effect of thermal treatment on the 57Fe Mössbauer spectrum of beryl.-
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