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A Raman and Infrared Spectroscopic Study of the Phosphate Mineral Pseudolaueite and in Comparison with Strunzite and Ferrostrunzite

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Abstract

The Raman spectra of pseudolaueite, strunzite, ferrostrunzite and ferristrunzite have been obtained at 298 K using Raman microscopy. These spectra are compared with their infrared spectra. The vibrational spectra of the four minerals are different, in line with differences in crystal structure and composition. Some similarity in the Raman spectra of the hydroxyl-stretching region exists, particularly but characteristic differences in the OH deformation regions are observed. Differences are also observed in the phosphate stretching and deformation regions.

Graphical Abstract

This paper offers new knowledge and understanding of the mineral pseudolaueite of formula Mn2+Fe2 3+(PO4)2(OH)2·8H2O,a hydrated hydroxy phosphate of ferric iron and manganese.

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Acknowledgments

The financial and infra-structure support of the Discipline of Nanotechnology and Molecular Science, Science and Engineering Faculty of the Queensland University of Technology, is gratefully acknowledged. The Australian Research Council (ARC) is thanked for funding the instrumentation. R. Scholz thanks to CNPq—Conselho Nacional de Desenvolvimento Científico e Tecnológico (Grants Nos. 306287/2012-9 and 402852/2012-5) and PROPP/UFOP, Project No. 03/2014. L.

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Authors and Affiliations

  1. School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD, 4001, Australia

    Ray L. Frost & Lina Wang

  2. Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Prêto, MG, 35400-00, Brazil

    Ricardo Scholz

Authors
  1. Ray L. Frost
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  2. Ricardo Scholz
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  3. Lina Wang
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Correspondence to Ray L. Frost.

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Frost, R.L., Scholz, R. & Wang, L. A Raman and Infrared Spectroscopic Study of the Phosphate Mineral Pseudolaueite and in Comparison with Strunzite and Ferrostrunzite. J Chem Crystallogr 45, 391–400 (2015). https://doi.org/10.1007/s10870-015-0606-y

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  • DOI: https://doi.org/10.1007/s10870-015-0606-y

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