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SEM, EDX and vibrational spectroscopic study of the carbonate mineral donnayite-(Y) NaCaSr3Y(CO3)6·3H2O

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Abstract

The mineral donnayite-(Y) has been studied by scanning electron microscopy with chemical analysis using EDX and vibrational spectroscopy. Multiple carbonate stretching modes are observed and support the concept of non-equivalent carbonate units in the donnayite-(Y) structure. Intense sharp bands at 464, 479 and 508 cm−1 are assigned to YO stretching modes. Raman bands at 765 and 775 cm−1 are assigned to the CO3 2− ν 4 bending modes and Raman bands at 589, 611, 674 and 689 cm−1 are assigned to the CO3 2− ν 2 bending modes. Multiple Raman and infrared bands in the OH stretching region are observed, proving the existence of water in different molecular environments in the structure of donnayite-(Y).

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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. B. Firmino is grateful to PIBIT/CNPq/UFOP.

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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 Queensland, 4001, Australia

    Ray L. Frost & Andrés López

  2. Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG, 35,400-00, Brazil

    Ricardo Scholz & Bárbara Firmino

Authors
  1. Ray L. Frost
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  2. Andrés López
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  3. Ricardo Scholz
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  4. Bárbara Firmino
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Correspondence to Ray L. Frost.

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Frost, R.L., López, A., Scholz, R. et al. SEM, EDX and vibrational spectroscopic study of the carbonate mineral donnayite-(Y) NaCaSr3Y(CO3)6·3H2O. Carbonates Evaporites 31, 1–8 (2016). https://doi.org/10.1007/s13146-015-0245-6

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  • DOI: https://doi.org/10.1007/s13146-015-0245-6

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