Characterization of the sulphate mineral coquimbite, a secondary iron sulphate from Javier Ortega mine, Lucanas Province, Peru – Using infrared, Raman spectroscopy and thermogravimetry.

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dc.contributor.authorFrost, Ray Leslie
dc.contributor.authorGobac, Željka Žigovečki
dc.contributor.authorLópez, Andrés
dc.contributor.authorXi, Yunfei
dc.contributor.authorCipriano, Ricardo Augusto Scholz
dc.contributor.authorLana, Cristiano de Carvalho
dc.contributor.authorLima, Rosa Malena Fernandes
dc.date.accessioned2014-11-10T16:50:23Z
dc.date.available2014-11-10T16:50:23Z
dc.date.issued2014
dc.description.abstractThe mineral coquimbite has been analysed using a range of techniques including SEM with EDX, thermal analytical techniques and Raman and infrared spectroscopy. The mineral originated from the Javier Ortega mine, Lucanas Province, Peru. The chemical formula was determined as (Fe1.37^3+; Al0.63)Σ2.00(SO4)3. 9H2O. Thermal analysis showed a total mass loss of ~73.4% on heating to 1000 °C. A mass loss of 30.43% at 641.4 °C is attributed to the loss of SO3. Observed Raman and infrared bands were assigned to the stretching and bending vibrations of sulphate tetrahedra, aluminium oxide/hydroxide octahedra, water molecules and hydroxyl ions. The Raman spectrum shows well resolved bands at 2994, 3176, 3327, 3422 and 3580 cm^-1 attributed to water stretching vibrations. Vibrational spectroscopy combined with thermal analysis provides insight into the structure of coquimbite.pt_BR
dc.identifier.citationFROST, RAY L. et al. Characterization of the sulphate mineral coquimbite, a secondary iron sulphate from Javier Ortega mine, Lucanas Province, Peru – Using infrared, Raman spectroscopy and thermogravimetry. Journal of Molecular Structure (Print), v. 1, p. 1, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0022286014001586>. Acesso em: 04 de set. 2014.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.molstruc.2014.01.086
dc.identifier.issn0022-2860
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/3741
dc.language.isoen_USpt_BR
dc.rights.licenseO periódico Journal of Molecular Structure concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3466021201372.pt_BR
dc.subjectCoquimbitept_BR
dc.subjectAmarantitept_BR
dc.subjectRaman spectroscopypt_BR
dc.subjectSulphatept_BR
dc.subjectInfrared spectroscopypt_BR
dc.titleCharacterization of the sulphate mineral coquimbite, a secondary iron sulphate from Javier Ortega mine, Lucanas Province, Peru – Using infrared, Raman spectroscopy and thermogravimetry.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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