Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1051, Issue -, Pages 292-298Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molstruc.2013.07.058
Keywords
Barbosalite; Phosphate; Raman; Infrared; Pegmatite
Categories
Funding
- Discipline of Nanotechnology and Molecular Science, Science and Engineering Faculty of the Queensland University of Technology
- Australian Research Council (ARC)
- CNPq - Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [306287/2012-9]
Ask authors/readers for more resources
Natural single-crystal specimens of barbosalite from Brazil, with general formula Fe2+Fe23+(PO4)(2)(OH)(2) were investigated by Raman and infrared spectroscopy. The mineral occurs as secondary products in granitic pegmatites. The Raman spectrum of barbosalite is characterized by bands at 1020, 1033 and 1044 cm(-1) cm(-1), assigned to nu(1) symmetric stretching mode of the HOPO33- and PO43- units. Raman bands at around 1067, 1083 and 1138 cm(-1) are attributed to both the HOP and PO antisymmetric stretching vibrations. The set of Raman bands observed at 575, 589 and 606 cm(-1) are assigned to the nu(4) out of plane bending modes of the PO4 and H2PO4 units. Raman bands at 439, 461, 475 and 503 cm(-1) are attributed to the nu(2) PO4 and H2PO4 bending modes. Strong Raman bands observed at 312, 346 cm(-1) with shoulder bands at 361, 381 and 398 cm(-1) are assigned to FeO stretching vibrations. No bands which are attributable to water vibrations were found. Vibrational spectroscopy enables aspects of the molecular structure of barbosalite to be assessed. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available