Frost, Ray LeslieCipriano, Ricardo Augusto ScholzLópez, AndrésTheiss, Frederick L.2015-02-272015-02-272014FROST, R. L. et al. Vibrational spectroscopic study of the natural layered double hydroxide manasseite now defined as hydrotalcite-2H - Mg6Al2(OH)16[CO3]-4H2O. Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, v. 118, p. 187-191, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1386142513009797>. Acesso em: 07 out. 2014.1386-1425http://www.repositorio.ufop.br/handle/123456789/4513Raman and thermo-Raman spectroscopy have been applied to study the mineral formerly known as manasseite now simply renamed as hydrotalcite-2H Mg6Al2(OH)16[CO3]_4H2O. The mineral is a member of the homonymous hydrotalcite supergroup. Hydrogen bond distances calculated using a Libowitzky-type empirical function varied between 2.61 and 3.00 Å. Stronger hydrogen bonds were formed by water units as compared to the hydroxyl units. Raman spectroscopy enabled the identification of bands attributed to the hydroxyl units. Two Raman bands at 1059 and 1064 cm_1 are assigned to symmetric stretching modes of the carbonate anion. Thermal treatment shifts these bands to higher wavenumbers indicating a change in the strength of the carbonate bonding.en-USManesseiteHydrotalcitePyroauriteRaman spectroscopyInfrared spectroscopyVibrational spectroscopic study of the natural layered double hydroxide manasseite now defined as hydrotalcite-2H - Mg6Al2(OH)16[CO3]-4H2O.Artigo 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: 3487271236523.https://doi.org/10.1016/j.saa.2013.08.105