Infrared and Raman spectroscopic characterization of the borate mineral hydroboracite CaMg[B3O4(OH)3]2 3H2O – implications for the molecular structure.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorFrost, Ray L.-
Autor(es): dc.creatorSholz, Ricardo Augusto-
Autor(es): dc.creatorLópez, Andrés-
Autor(es): dc.creatorXi, Yunfei-
Autor(es): dc.creatorGraça, Leonardo Martins-
Data de aceite: dc.date.accessioned2019-11-06T13:31:13Z-
Data de disponibilização: dc.date.available2019-11-06T13:31:13Z-
Data de envio: dc.date.issued2014-11-27-
Data de envio: dc.date.issued2014-11-27-
Data de envio: dc.date.issued2014-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4046-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557087-
Descrição: dc.descriptionWe have studied the mineral hydroboracite CaMg[B3O4(OH)3]2 3H2O using electron microscopy and vibrational spectroscopy. Both tetrahedral and trigonal boron units are observed. The nominal resolution of the Raman spectrometer is of the order of 2 cm^-1 and as such is sufficient enough to identify separate bands for the stretching bands of the two boron isotopes. The Raman band at 1039 cm^-1 is assigned to BO stretching vibration. Raman bands at 1144, 1157, 1229, 1318 cm^-1 are attributed to the BOH in-plane bending modes. Raman bands at 825 and 925 cm^-1 are attributed to the antisymmetric stretching modes of tetrahedral boron. The sharp Raman peak at 925 cm^-1 is from the 11-B component such a mode, then it should have a smaller 10-B satellite near (1.03) x (925) = 952 cm^-1, and indeed a small peak at 955 is observed. Four sharp Raman bands observed at 3371, 3507, 3563 and 3632 cm^-1 are attributed to the stretching vibrations of hydroxyl units. The broad Raman bands at 3076, 3138, 3255, 3384 and 3551 cm^-1 are assigned to water stretching vibrations. Infrared bands at 3367, 3505, 3559 and 3631 cm^-1 are assigned to the stretching vibration of the hydroxyl units. Broad infrared bands at 3072 and 3254 cm^-1 are assigned to water stretching vibrations. Infrared bands at 1318, 1349, 1371, 1383 cm^-1 are assigned to the antisymmetric stretching vibrations of trigonal boron.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Molecular Structure concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3481460562553.-
Palavras-chave: dc.subjectHydroboracite-
Palavras-chave: dc.subjectBorate-
Palavras-chave: dc.subjectBoron-
Palavras-chave: dc.subjectRaman spectroscopy-
Palavras-chave: dc.subjectIsotopic splitting-
Palavras-chave: dc.subjectEspectroscopia raman-
Título: dc.titleInfrared and Raman spectroscopic characterization of the borate mineral hydroboracite CaMg[B3O4(OH)3]2 3H2O – implications for the molecular structure.-
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