Optical absorption and EPR studies on tenorite mineral |
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| Authors: | R. Rama Subba Reddy S. Lakshmi Reddy P.S. Rao R.L. Frost |
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| Affiliation: | 1. Dept. of Chemistry, S.V.D. College, Kadapa 516 003, India;2. Dept. of Physics, S.V.D. College, Kadapa 516 003, India;3. Dept. of Chemistry, Pondicherry University, Pondicherry 605 014, India;4. Inorganic Materials Research Program, Queensland University of Technology, 2 George Street, Brisbane, GPO Box 2434, Queensland 4001, Australia |
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| Abstract: | Optical absorption and EPR studies of the mineral tenorite, a cupric oxide which originated from Mexico and contains 54.40 wt% of CuO. EPR spectral results indicate two Cu(II) closely interacting ions to give a d2 type structure. The calculated spin Hamiltonian at room temperature and liquid nitrogen temperature is g = 2.160 and D = 125 G. The intensity of resonance line is not the same in low and high field regions. The optical absorption spectrum is due to Cu(II) in which three sets of energies indicating Cu(II) in two independent tetragonal C4v symmetry, in addition to d2 structure of octahedral coordination. The octahedral and tetragonal field parameters are compared with those reported for several other copper containing minerals. |
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