Electron paramagnetic resonance and optical absorption spectral studies on chalcocite
Frost, Ray L., Reddy, S. Lakshmi, Fayazuddin, Mohammed, & Endo, Tamio (2007) Electron paramagnetic resonance and optical absorption spectral studies on chalcocite. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 68, pp. 420-423.
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Abstract
A chalcocite mineral sample of Shaha, Congo is used in the present study. An EPR study on powdered sample confirms the presence of Mn(II), Fe(III) and Cu(II). Optical absorption spectrum indicates that Fe(III) impurity is present in octahedral structure whereas Cu(II) is present in rhombically distorted octahedral environment. Mid infrared results are due to water and sulphate fundamentals.
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