Assessment of the molecular structure of natrodufrénite – NaFe^2+Fe^3+(PO4)4(OH)6.2(H2O), a secondary pegmatite phosphate mineral from Minas Gerais, Brazil.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorLópez, Andrés-
Autor(es): dc.creatorFrost, Ray L.-
Autor(es): dc.creatorXi, Yunfei-
Autor(es): dc.creatorScholz, Ricardo Augusto-
Autor(es): dc.creatorBelotti, Fernanda Maria-
Autor(es): dc.creatorRibeiro, Érika-
Data de aceite: dc.date.accessioned2019-11-06T13:31:38Z-
Data de disponibilização: dc.date.available2019-11-06T13:31:38Z-
Data de envio: dc.date.issued2014-12-14-
Data de envio: dc.date.issued2014-12-14-
Data de envio: dc.date.issued2013-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4165-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557262-
Descrição: dc.descriptionThe mineral natrodufrénite a secondary pegmatite phosphate mineral from Minas Gerais, Brazil, has been studied by a combination of scanning electron microscopy and vibrational spectroscopic techniques. Electron probe analysis shows the formula of the studied mineral as(Na0.88Ca0.12)P1.00(Fe2þ0:72Mn0.11Mg0.08Ca0.04Zr0.01Cu0.01)P0.97 (Fe3þ4:89Al0.02)P4.91(PO4)3.96(OH6.15F0.07)6.22.2.05(H2O). Raman spectroscopy identifies an intense peak at 1003 cm^-1 assigned to the PO4^-3 m1 symmetric stretching mode. Raman bands are observed at 1059 and 1118 cm^-1 and are attributed to the PO4^-3 m3 antisymmetric stretching vibrations. A comparison is made with the spectral data of other hydrate hydroxy phosphateminerals including cyrilovite andwardite. Raman bands at560, 582,619 and 668 cm^-1 are assigned tothe m4PO3 4 bendingmodes and Ramanbands at425,444, 477 and 507 cm^-1 are due to the m2PO3 4 bendingmodes. Raman bands inthe 2600–3800 cm^-1 spectral range are attributed towater and OH stretching vibrations. Vibrational spectroscopy enables aspects of themolecular structure of natrodufrénite to be assessed..-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Molecular Structure concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3487241294767.-
Palavras-chave: dc.subjectNatrodufrénite-
Palavras-chave: dc.subjectPhosphate-
Palavras-chave: dc.subjectPegmatite-
Palavras-chave: dc.subjectInfrared spectroscopy-
Palavras-chave: dc.subjectRaman spectroscopy-
Título: dc.titleAssessment of the molecular structure of natrodufrénite – NaFe^2+Fe^3+(PO4)4(OH)6.2(H2O), a secondary pegmatite phosphate mineral from Minas Gerais, Brazil.-
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