Frost, Ray LeslieXi, YunfeiCipriano, Ricardo Augusto Scholz2014-12-142014-12-142012FROST, R. L.; XI, Y.; CIPRIANO, R. A. S. Assessment of the molecular structure of the borate mineral boracite Mg3B7O13Cl using vibrational spectroscopy. Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 96, p. 946-951, 2012. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1386142512007366>. Acesso em: 07 out. 2014.1386-1425http://www.repositorio.ufop.br/handle/123456789/4156Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl and occurs as blue green, colorless, gray, yellow to white crystals in the orthorhombic – pyramidal crystal system. An intense Raman band at 1009 cm_1 was assigned to the BO stretching vibration of the B7O13 units. Raman bands at 1121, 1136, 1143 cm_1 are attributed to the in-plane bending vibrations of trigonal boron. Four sharp Raman bands observed at 415, 494, 621 and 671 cm_1 are simply defined as trigonal and tetrahedral borate bending modes. The Raman spectrum clearly shows intense Raman bands at 3405 and 3494 cm_1, thus indicating that some Cl anions have been replaced with OH units. The molecular structure of a natural boracite has been assessed by using vibrational spectroscopy.en-USRaman spectroscopyBorateBoraciteInfraredEvaporiteArtigo 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: 3487240883212.https://doi.org/10.1016/j.saa.2012.07.115