Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/4160
Title: Infrared and Raman spectroscopic characterization of the arsenate mineral ceruleite Cu2Al7(AsO4)4(OH)13 11.5(H2O).
Authors: Frost, Ray L.
López, Andrés
Cipriano, Ricardo Augusto Scholz
Xi, Yunfei
Keywords: Ceruleite
Arsenate
Roselite
Raman spectroscopy
Infrared spectroscopy
Issue Date: 2013
Citation: FROST, R. L. et al. Infrared and Raman spectroscopic characterization of the arsenate mineral ceruleite Cu2Al7(AsO4)4(OH)13 11.5(H2O). Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 116, p. 518-523, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1386142513008512>. Acesso em: 07 out. 2014.
Abstract: The molecular structure of the arsenate mineral ceruleite has been assessed using a combination of Raman and infrared spectroscopy. The most intense band observed at 903 cm^-1 is assigned to the (AsO4)^3- symmetric stretching vibrational mode. The infrared spectrum shows intense bands at 787, 827 and 886 cm^-1, ascribed to the triply degenerate m3 antisymmetric stretching vibration. Raman bands observed at 373, 400, 417 and 430 cm^-1 are attributed to the m2 vibrational mode. Three broad bands for ceruleite found at 3056, 3198 and 3384 cm^-1 are assigned to water OH stretching bands. By using a Libowitzky empirical equation, hydrogen bond distances of 2.65 and 2.75 Å are calculated. Vibrational spectra enable the molecular structure of the ceruleite mineral to be determined and whilst similarities exist in the spectral patterns with the roselite mineral group, sufficient differences exist to be able to determine the identification of the minerals.
URI: http://www.repositorio.ufop.br/handle/123456789/4160
metadata.dc.identifier.doi: https://doi.org/10.1016/j.saa.2013.07.103
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: 3487241460181.
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