1. Materials Technology Section Industrial Technology Institute Colombo 07, 00700 Sri Lanka
2. Postgraduate Institute of Science (PGIS) University of Peradeniya Peradeniya 20400 Sri Lanka
3. Department of Geology Faculty of Science University of Peradeniya Peradeniya Sri Lanka
4. Department of Chemistry Faculty of Science University of Peradeniya Peradeniya Sri Lanka