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EPMA, EPR, electronic and vibrational spectral studies on natural aurichalcite

  • Papers Presented At The Materials Science Section Of The 82nd Indian Science Congress, Calcutta, 1995
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Abstract

The electron probe micro analysis (EPMA), electron paramagnetic resonance (EPR), electronic and vibrational spectral studies on a natural mineral, aurichalcite were studied at room temperature. The EPMA analysis revealed the concentration of copper in the mineral to be 2·6 wt% and zinc as 24·5 wt%. The optical spectra revealed the presence of copper inD 4h symmetry with crystal field (Dq) and tetragonal field (Ds andDt) parameters as 1250, 1600 and 520 cm−1 respectively. This further confirmed the presence of Cu(II) ion in an elongated tetragonal site. The EPR studies indicated the presence of Cu(II) ion, but hyperfine lines could not be resolved due to the high concentration of the paramagnetic impurity in the mineral. The IR spectrum confirmed the presence of water and carbonate ion.

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Authors and Affiliations

  1. Department of Physics, S V University, 517 502, Tirupati, India

    S Vedanand, B Madhu Sudhana, B J Reddy & P Sambasiva Rao

  2. Department of Chemistry, Pondicherry University, 605 014, Pondicherry, India

    P Sambasiva Rao

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  1. S Vedanand
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  2. B Madhu Sudhana
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  3. B J Reddy
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  4. P Sambasiva Rao
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Vedanand, S., Madhu Sudhana, B., Reddy, B.J. et al. EPMA, EPR, electronic and vibrational spectral studies on natural aurichalcite. Bull. Mater. Sci. 19, 1089–1094 (1996). https://doi.org/10.1007/BF02744642

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  • DOI: https://doi.org/10.1007/BF02744642

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