Chemistry, Raman and infrared spectroscopic characterization of the phosphate mineral reddingite : (MnFe)3(PO4)2(H2O,OH)3, a mineral found in lithium-bearing pegmatite.
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Data
2012
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Resumo
Detailed investigation of an intermediate member
of the reddingite–phosphoferrite series, using infrared
and Raman spectroscopy, scanning electron microcopy and
electron microprobe analysis, has been carried out on a
homogeneous sample from a lithium-bearing pegmatite
named Cigana mine, near Conselheiro Pena, Minas Gerais,
Brazil. The determined formula is ðMn1:60Fe1:21Ca0:01
Mg0:01ÞP2:83ðPO4Þ2:12 ðH2O2:85F0:01ÞP2:86, indicating
predominance in the reddingite member. Raman spectroscopy
coupled with infrared spectroscopy supports the concept
of phosphate, hydrogen phosphate and dihydrogen
phosphate units in the structure of reddingite-phosphoferrite.
Infrared and Raman bands attributed to water and hydroxyl
stretching modes are identified. Vibrational spectroscopy
adds useful information to the molecular structure of reddingite–
phosphoferrite.
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Raman, Infrared, Molecular structure, Reddingite – phosphoferrite
Citação
FROST, R. L. et al. Chemistry, Raman and infrared spectroscopic characterization of the phosphate mineral reddingite: (MnFe)3(PO4)2(H2O,OH)3, a mineral found in lithium-bearing pegmatite. Physics and Chemistry of Minerals, v. 39, p. 803-810, 2012. Disponível em: <https://link.springer.com/article/10.1007%2Fs00269-012-0535-7>. Acesso em: 20 de jun. 2017.