Frost, Ray LeslieLópez, AndrésCipriano, Ricardo Augusto ScholzXi, Yunfei2015-01-222015-01-222013FROST, R. l. et al. Vibrational spectroscopy of the borate mineral chambersite MnB7O13Cl - implications for the molecular structure. Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 120, p. 270-273, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1386142513011839>. Acesso em: 07 out. 2014.1386-1425http://www.repositorio.ufop.br/handle/123456789/4339Chambersite is a manganese borate mineral with formula: MnB7O13Cl and occurs as colorless crystals in the monoclinic pyramidal crystal system. Raman bands at 902, 920, 942 and 963 cm^-1 are assigned to the BO stretching vibration of the B7O13 units. Raman bands at 1027, 1045, 1056, 1075 and 1091 cm^-1 are attributed to the BCl in-plane bending modes. The intense infrared band at 866 cm^-1 is assigned to the trigonal borate stretching modes. The Raman band at 660 cm^-1 together with bands at 597, 642 679, 705 and 721 cm^-1 are assigned to the trigonal and tetrahedral borate bending modes. The molecular structure of a natural chambersite has been assessed using vibrational spectroscopy.en-USBorateChambersiteFerroelectric propertiesRaman spectroscopyInfrared spectroscopyArtigo publicado em periodicoO periódico Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3487241178053.https://doi.org/10.1016/j.saa.2013.10.026