Use este identificador para citar ou linkar para este item: http://www.repositorio.ufop.br/handle/123456789/4189
Título: Infrared and Raman spectroscopic characterization of the borate mineral colemanite CaB3O4(OH)3 H2O - implications for the molecular structure.
Autor(es): Frost, Ray L.
Xi, Yunfei
Cipriano, Ricardo Augusto Scholz
Belotti, Fernanda Maria
Cândido Filho, Mauro
Palavras-chave: Raman spectroscopy
Colemanite
Infrared spectroscopy
Borate
Evaporite
Data do documento: 2013
Referência: FROST, et al. Infrared and Raman spectroscopic characterization of the borate mineral colemanite CaB3O4(OH)3 H2O - implications for the molecular structure. Journal of Molecular Structure, v. 1037, p. 23-28, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022286012010885>. Acesso em: 07 out. 2014.
Resumo: Colemanite CaB3O4(OH)3_H2O is a secondary borate mineral formed from borax and ulexite in evaporate deposits of alkaline lacustrine sediments. The basic structure of colemanite contains endless chains of interlocking BO2(OH) triangles and BO3(OH) tetrahedrons with the calcium, water and extra hydroxide units interspersed between these chains. The Raman spectra of colemanite is characterized by an intense band at 3605 cm_1 assigned to the stretching vibration of OH units and a series of bands at 3182, 3300, 3389 and 3534 cm_1 assigned to water stretching vibrations. Infrared bands are observed in similar positions. The BO stretching vibrations of the trigonal and tetrahedral boron are characterized by Raman bands at 876, 1065 and 1084 cm_1. The OBO bending mode is defined by the Raman band at 611 cm_1. It is important to characterize the very wide range of borate minerals including colemanite because of the very wide range of applications of boron containing minerals.
URI: http://www.repositorio.ufop.br/handle/123456789/4189
ISSN: 00222860
Licença: O Periódico Journal of Molecular Structure concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3490330427922.
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