Cipriano, Ricardo Augusto ScholzXi, YunfeiFrost, Ray Leslie2015-01-162015-01-162013SCHOLZ, R. A.; XI, Y.; FROST, R. L. The molecular structure of matioliite NaMgAl5(PO4)4(OH)6 2(H2O) - a pegmatite mineral from Minas Gerais, Brazil. Journal of Molecular Structure, v. 1033, p. 265-271, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022286012008897> . Acesso em: 07 out. 2014.0022-2860http://www.repositorio.ufop.br/handle/123456789/4255Detailed spectroscopic and chemical investigation of matioliite, including infrared and Raman spectroscopy, scanning electron microscopy and electron probe microanalysis has been carried out on homogeneous samples from the Gentil pegmatite, Mendes Pimentel, Minas Gerais, Brazil. The chemical composition is (wt.%): FeO 2.20, CaO 0.05, Na2O 1.28, MnO 0.06, Al2O3 39.82, P2O5 42.7, MgO 4.68, F 0.02 and H2O 9.19; total 100.00. The mineral crystallize in the monoclinic crystal system, C2/c space group, with a = 25.075(1) Å, b = 5.0470(3) Å, c = 13.4370(7) Å, b = 110.97(3)_, V = 1587.9(4) Å3, Z = 4. Raman spectroscopy coupled with infrared spectroscopy supports the concept of phosphate, hydrogen phosphate and dihydrogen phosphate units in the structure of matioliite. Infrared and Raman bands attributed to water and hydroxyl stretching modes are identified. Vibrational spectroscopy adds useful information to the molecular structure of matioliite.en-USMatioliitePhosphatePegmatiteInfrared spectroscopyScanning electron microscopyArtigo publicado em periodicoO periódico Journal of Molecular Structure concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3487791403136.https://doi.org/10.1016/j.molstruc.2012.09.055