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Title: Vibrational spectroscopic characterization of the phosphate mineral bermanite Mn2+Mn23+(PO4)2(OH)2 4(H2O).
Authors: Frost, Ray Leslie
Xi, Yunfei
Cipriano, Ricardo Augusto Scholz
Belotti, Fernanda Maria
Keywords: Raman spectroscopyz
Infrared spectroscopy
Issue Date: 2012
Citation: FROST, R. L. et al. Vibrational spectroscopic characterization of the phosphate mineral bermanite Mn2+Mn23+(PO4)2(OH)2 4(H2O). Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 105, p. 359-364, 2012. Disponível em: <>. Acesso em: 07 out. 2014.
Abstract: Bermanite Mn^2+Mn2^3+(PO4)2(OH)2.4(H2O) is a mixed valent hydrated hydroxy phosphate mineral. The mineral is reddish-brown and occurs in crystal aggregates and as lamellar masses. Bermanite is a common mineral in granitic pegmatites. The chemical composition of bermanite was obtained using EDS techniques. We have studied the molecular structure of bermanite using vibrational spectroscopy. The mineral is characterized by a Raman doublet at 991 and 999 cm^-1 attributed to the phosphate stretching mode of two non-equivalent phosphate units. Raman bands at 1071, 1117 and 1142 cm^-1 are assigned to the phosphate antisymmetric stretching modes. The hydroxyl stretching spectral region is complex with overlapping bands attributed to water and hydroxyl stretching vibrations. Vibrational spectroscopy proves most useful for the study of the mineral bermanite.
ISSN: 1386-1425
metadata.dc.rights.license: O periódico Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3490330614977.
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