Authors:
R. Dutta

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D. Das Inter University Consortium for DAE Facilities Calcutta Centre III/LB-8 Bidhan Nagar 700 091 Calcutta India

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M. Sudarshan Inter University Consortium for DAE Facilities Calcutta Centre III/LB-8 Bidhan Nagar 700 091 Calcutta India

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S. Bhattacharyya Inter University Consortium for DAE Facilities Calcutta Centre III/LB-8 Bidhan Nagar 700 091 Calcutta India

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S. Chintalapudi Inter University Consortium for DAE Facilities Calcutta Centre III/LB-8 Bidhan Nagar 700 091 Calcutta India

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V. Chakravortty Utkal University Department of Chemistry Vani Vihar 751004 Bhubaneswar India

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Abstract  

The iron bearing phases present in a ferromanganese nodule from the Central Indian Ocean have been determined using57Fe Mössbauer spectroscopy. The Mössbauer results have been corroborated by XRD, IR and TG-DTA studies. The Mössbauer spectrum of a ferromanganese nodule shows a broad line width which indicates the presence of more than one iron bearing paramagnetic oxide or oxyhydroxide phases where iron is present as Fe3+. -FeOOH has been distinctly characterised as one of the iron bearing phases in the nodule. Other oxyhydroxide and oxide phases of iron in the nodule have been ruled out. A typical paramagnetic doublet persists even at very high temperature which has been proposed to be due to iron(III)phosphate. Formation of solid solution of Mn2O3–Fe2O3 has been observed in the heat treated nodule at 1073 K, which has been characterised by the Mössbauer technique.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)