Use este identificador para citar ou linkar para este item: http://www.repositorio.ufop.br/handle/123456789/3959
Título: Vibrational spectroscopic characterization of the phosphate mineral phosphophyllite – Zn2Fe(PO4)2 4H2O, from Hagendorf Süd, Germany and in comparison with other zinc phosphates.
Autor(es): Scholz, Ricardo Augusto
Frost, Ray L.
Xi, Yunfei
Graça, Leonardo Martins
Lagoeiro, Leonardo Evangelista
López, Andrés
Palavras-chave: Phosphophyllite
Phosphate
Pegmatite
Raman spectroscopy
Infrared spectroscopy
Data do documento: 2013
Referência: SHOLZ, Ricardo et al. Vibrational spectroscopic characterization of the phosphate mineral phosphophyllite – Zn2Fe(PO4)2 4H2O, from Hagendorf Süd, Germany and in comparison with other zinc phosphates. Journal of Molecular Structure, v. 1039, p. 22-27, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022286013001105>. Acesso em: 30 set. 2014.
Resumo: This research was undertaken on phosphophyllite sample from the Hagendorf Süd pegmatite, Bavaria, Germany. Chemical analysis was carried out by Scanning Electron Microscope in the EDS mode and indicates a zinc and iron phosphate with partial substitution of manganese, which partially replaced iron. The calculated chemical formula of the studied sample was determined to be: Zn2(Fe0.65, Mn0.35)P1.00(PO4)2- .4(H2O). The intense Raman peak at 995 cm^-11 is assigned to the m1 PO4^3- symmetric stretching mode and the two Raman bands at 1073 and 1135 cm^-1 to the m3 PO4^3- antisymmetric stretching modes. The m4 PO4^3- bending modes are observed at 505, 571, 592 and 653 cm^-1 and the m2 PO4^3- bending mode at 415 cm^-1. The sharp Raman band at 3567 cm^-1 attributed to the stretching vibration of OH units brings into question the actual formula of phosphophyllite. Vibrational spectroscopy enables an assessment of the molecular structure of phosphophyllite to be assessed.
URI: http://www.repositorio.ufop.br/handle/123456789/3959
ISSN: 00222860
Licença: O Periódico Journal of Molecular Structure concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3481460386786
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