Characterization of the sulphate mineral amarantite - using infrared, Raman spectroscopy and thermogravimetry.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorFrost, Ray L.-
Autor(es): dc.creatorLópez, Andrés-
Autor(es): dc.creatorScholz, Ricardo Augusto-
Autor(es): dc.creatorXi, Yunfei-
Autor(es): dc.creatorSilveira, Aléssio Jordan da-
Autor(es): dc.creatorLima, Rosa Malena Fernandes-
Data de aceite: dc.date.accessioned2019-11-06T13:31:42Z-
Data de disponibilização: dc.date.available2019-11-06T13:31:42Z-
Data de envio: dc.date.issued2014-12-17-
Data de envio: dc.date.issued2014-12-17-
Data de envio: dc.date.issued2013-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4196-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557289-
Descrição: dc.descriptionThe mineral amarantite Fe3þ 2 (SO4)O _ 7H2O has been studied using a combination of techniques including thermogravimetry, electron probe analyses and vibrational spectroscopy. Thermal analysis shows decomposition steps at 77.63, 192.2, 550 and 641.4 _C. The Raman spectrum of amarantite is dominated by an intense band at 1017 cm_1 assigned to the SO2_ 4 m1 symmetric stretching mode. Raman bands at 1039, 1054, 1098, 1131, 1195 and 1233 cm_1 are attributed to the SO2_ 4 m3 antisymmetric stretching modes. Very intense Raman band is observed at 409 cm_1 with shoulder bands at 399, 451 and 491 cm_1 are assigned to the m2 bending modes. A series of low intensity Raman bands are found at 543, 602, 622 and 650 cm_1 are assigned to the m4 bending modes. A very sharp Raman band at 3529 cm_1 is assigned to the stretching vibration of OH units. A series of Raman bands observed at 3025, 3089, 3227, 3340, 3401 and 3480 cm_1 are assigned to water bands. Vibrational spectroscopy enables aspects of the molecular structure of the mineral amarantite to be ascertained.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença  3487300298651.-
Palavras-chave: dc.subjectRaman spectroscopy-
Palavras-chave: dc.subjectAmarantite-
Palavras-chave: dc.subjectInfrared spectroscopy-
Palavras-chave: dc.subjectSulphate-
Palavras-chave: dc.subjectEvaporite-
Título: dc.titleCharacterization of the sulphate mineral amarantite - using infrared, Raman spectroscopy and thermogravimetry.-
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