A vibrational spectroscopic study of the silicate mineral ardennite-(As).
dc.contributor.author | Frost, Ray Leslie | |
dc.contributor.author | López, Andrés | |
dc.contributor.author | Xi, Yunfei | |
dc.contributor.author | Cipriano, Ricardo Augusto Scholz | |
dc.contributor.author | Gandini, Antônio Luciano | |
dc.date.accessioned | 2015-02-26T17:02:11Z | |
dc.date.available | 2015-02-26T17:02:11Z | |
dc.date.issued | 2014 | |
dc.description.abstract | We have used a combination of scanning electron microscopy with EDX and vibrational spectroscopy to study the mineral ardennite-(As). The mineral ardennite-(As) of accepted formula Mn4(2+)(Al,Mg)6(Si3O10)(SiO4)2(AsO4,VO4)(OH)6 is a silicate mineral which may contain arsenate and/or vanadates anions. Because of the oxyanions present, the mineral lends itself to analysis by Raman and infrared spectroscopy. Qualitative chemical analysis shows a homogeneous phase, composed by Si, Mn, Al and As. Ca and V were also observed in partial substitution for Mn and As. Raman bands at 1197, 1225, 1287 and 1394 cm(-1) are assigned to SiO stretching vibrations. The strong Raman bands at 779 and 877 cm(-1) are assigned to the AsO4(3-) antisymmetric and symmetric stretching vibrations. The Raman band at 352 cm(-1) is assigned to the ν2 symmetric bending vibration. The series of Raman bands between 414 and 471 cm(-1)are assigned to the ν4 out of plane bending modes of the AsO4(3-) units. Intense Raman bands observed at 301 and 314 cm(-1) are attributed to the MnO stretching and bending vibrations. Raman bands at 3041, 3149, 3211 and 3298 cm(-1) are attributed to the stretching vibrations of OH units. There is vibrational spectroscopic evidence for the presence of water adsorbed on the ardennite-(As) surfaces. | pt_BR |
dc.identifier.citation | FROST, R. L. et al. A vibrational spectroscopic study of the silicate mineral ardennite-(As). Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 118, p. 987-991, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1386142513011554>. Acesso em: 07 out. 2014. | pt_BR |
dc.identifier.doi | https://doi.org/10.1016/j.saa.2013.09.148 | |
dc.identifier.issn | 1386-1425 | |
dc.identifier.uri | http://www.repositorio.ufop.br/handle/123456789/4507 | |
dc.language.iso | en_US | pt_BR |
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: 3490330489368. | pt_BR |
dc.subject | Silicate | pt_BR |
dc.subject | Raman spectroscopy | pt_BR |
dc.subject | Ardennite | pt_BR |
dc.subject | Infrared spectroscopy | pt_BR |
dc.subject | Adsorbed water | pt_BR |
dc.title | A vibrational spectroscopic study of the silicate mineral ardennite-(As). | pt_BR |
dc.type | Artigo publicado em periodico | pt_BR |
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