Produção Nacional
Revisado por pares
Infrared and Raman Spectroscopic Characterization of the Phosphate Mineral Leucophosphite K(Fe 3+ ) 2 (PO 4 ) 2 (OH) · 2(H 2 O)
2013; Taylor & Francis; Volume: 46; Issue: 6 Linguagem: Inglês
10.1080/00387010.2012.733478
ISSN1532-2289
AutoresRay L. Frost, Yunfei Xi, Ricardo Scholz, Fernanda Maria Belotti, Mauro Cândido Filho,
Tópico(s)Chemical Synthesis and Characterization
ResumoABSTRACT ABSTRACT The phosphate mineral leucophosphite K(Fe2)3+(PO4)2(OH) · 2H2O has been characterized by SEM-EDS, Raman, and infrared spectroscopic measurements. The mineral is predominantly a K and Fe phosphate with some minor substitution of Al in the Fe3+ site. Raman bands at 994 and 1058 cm−1 are assigned to the symmetric stretching modes of and units. The Raman bands at 1104, 1135, and 1177 cm−1 are assigned to the and antisymmetric stretching modes. Raman and infrared spectra in the 2600–3800 cm−1 region show a complex set of overlapping bands, which may be resolved into the component bands. The Raman bands observed at 3325, 3355, and 3456 cm−1 are attributed to water stretching vibrations, and in the infrared spectrum, bands at 3237, 3317, and 3453 cm−1 are assigned to water stretching bands. KEYWORDS: infrared spectroscopyleucophosphitepegmatitephosphateRaman spectroscopy ACKNOWLEDGMENTS The financial and infrastructure 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. The authors would like to acknowledge the Center of Microscopy at the Universidade Federal de Minas Gerais (http://www.microscopia.ufmg.br) for providing the equipment and technical support for experiments involving electron microscopy. R. Scholz thanks FAPEMIG – Fundação de Amparo à Pesquisa do estado de Minas Gerais (grant no. CRA – APQ-03998-10).
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