Crystal Research and Technology
Cryst. Res. Technol. 39, 240 (2004) - Abstract -

Tetrahedral site of Fe(III) and Cu(II) in renierite

R. Rama Subba Reddy, Md. Fayazuddin*, G. Siva Reddy, S. Lakshmi Reddy**, P. Sambasiva Rao***, B. J. Reddy****, and F. Nieto Garcia****

Dept. of Chemistry, S.V.U.P.G.Centre, Kadapa 516 004, India
*Dept. of Physics, S.V. College, Suryapet 508 213, India
**Dept. of Physics, S.V.D.College, Kadapa 516 003, India
***Dept. of Chemistry, Pondicherry University, Pondicherry 605 014, India
****Dept. of Mineralogy and Petrology, University of Granada, Granada 18002, Spain

Keywords renierite, tetrahedral, Cu(II), Fe(III), optical absorption, EPR
PACS 91.60.-x
DOI 10.1002/crat.200310177

Renierite from Congo is used in the present investigations. It contains only two transition elements iron and copper. EPR results indicate the presence of Fe(III) and Cu(II) with g values 2.03 and 2.40 respectively. Optical absorption spectrum shows several energies in UV-Vis and NIR region. These energies indicate both Fe(III) and Cu(II) in tetrahedral site. IR spectrum confirms the presence of sulphate and hydroxyl groups in the mineral.



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