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Title: A vibrational spectroscopic study of the silicate mineral inesite Ca2(Mn,Fe)7Si10O28(OH)-5H2O.
Authors: Frost, Ray Leslie
López, Andrés
Xi, Yunfei
Cipriano, Ricardo Augusto Scholz
Keywords: Inesite
Raman spectroscopy
Infrared spectroscopy
Issue Date: 2014
Citation: FROST, R. L. et al. A vibrational spectroscopic study of the silicate mineral inesite Ca2(Mn,Fe)7Si10O28(OH)-5H2O. Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 128, p. 207-211, 2014. Disponível em: <>. Acesso em: 07 out. 2014.
Abstract: We have studied the hydrated hydroxyl silicate mineral inesite of formula Ca2(Mn,Fe)7Si10O28(OH)_5H2O using a combination of scanning electron microscopy with EDX and Raman and infrared spectroscopy. SEM analysis shows the mineral to be a pure monomineral with no impurities. Semiquantitative analysis shows a homogeneous phase, composed by Ca, Mn2+, Si and P, with minor amounts of Mg and Fe. Raman spectrum shows well resolved component bands at 997, 1031, 1051, and 1067 cm_1 attributed to a range of SiO symmetric stretching vibrations of [Si10O28] units. Infrared bands found at 896, 928, 959 and 985 cm_1 are attributed to the OSiO antisymmetric stretching vibrations. An intense broad band at 653 cm_1 with shoulder bands at 608, 631 and 684 cm_1 are associated with the bending modes of the OSiO units of the 6- and 8-membered rings of the [Si10O28] units. The sharp band at 3642 cm_1 with shoulder bands at 3612 and 3662 cm_1 are assigned to the OH stretching vibrations of the hydroxyl units. The broad Raman band at 3420 cm_1 with shoulder bands at 3362 and 3496 cm_1 are assigned to the water stretching vibrations. The application of vibrational spectroscopy has enabled an assessment of the molecular structure of inesite to be undertaken.
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: 3487791245157.
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