Electron paramagnetic resonance, optical absorption and Raman spectral studies on a pyrite/chalcopyrite mineral

Udayabhaskar Reddy, G., Seshamaheswaramma, K., Nakamura, Yoshinobu, Lakshmi Reddy, S., Frost, Ray L., & Endo, Tamio (2012) Electron paramagnetic resonance, optical absorption and Raman spectral studies on a pyrite/chalcopyrite mineral. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 96, pp. 310-315.

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Abstract

Pyrite and chalcopyrite mineral samples from Mangampet barite mine, Kadapa, Andhra Pradesh, India are used in the present study. XRD data indicate that the pyrite mineral has a face centered cubic lattice structure with lattice constant 5.4179 Å. Also it possesses an average particle size of 91.9 nm. An EPR study on the powdered samples confirms the presence of iron in pyrite and iron and Mn(II) in chalcopyrite. The optical absorption spectrum of chalcopyrite indicates presence of copper which is in a distorted octahedral environment. NIR results confirm the presence of water fundamentals and Raman spectrum reveals the presence of water and sulfate ions.

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ID Code: 58147
Item Type: Journal Article
Refereed: Yes
Keywords: Pyrite/chalcopyrite, XRD, EPR, Optical absorption spectra, NIR spectra, Raman spectrum
DOI: 10.1016/j.saa.2012.04.093
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: � 2012 Elsevier B.V. All rights reserved
Deposited On: 13 Mar 2013 01:37
Last Modified: 13 Mar 2013 01:37

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