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Electron paramagnetic resonance and optical absorption spectral studies on covellite mineral

By Ray L. Frost, G. Sowjanya, N.C.G. Reddy, S. Lakshmi Reddy and B. Jagannadha Reddy


A covellite mineral sample from Coquimbo region, Chile is used in the present study. An EPR study on powdered sample confirms the presence of Mn(II) and Cu(II). Optical absorption spectrum indicates that Fe(II)and Cu(II) impurities are present in octahedral structure. Bands in the near-infrared from 7000-5000 cm-1 result from the overtones of the first fundamental OH-stretching modes

Topics: 030600 PHYSICAL CHEMISTRY (INCL. STRUCTURAL), 030606 Structural Chemistry and Spectroscopy, 030603 Colloid and Surface Chemistry, Covellite, EPR, Optical absorption, NIR spectroscopy, Copper, Manganese, Iron
Publisher: Elsevier
Year: 2008
DOI identifier: 10.1016/j.saa.2007.12.053
OAI identifier:

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