1. Applied Chemistry Department; S.V.National Institute of Technology; Surat-395007 Gujarat India
2. Salt and Marine Chemicals Division; CSIR-Central Salt and Marine Chemicals; Research Institute, G. B. Marg; Bhavnagar-364002 India
3. Institute of Chemistry; The University of São Paulo, P. O. Box 26077; 05513-970 São Paulo, SP Brazil
4. Australian Centre for Neutron Scattering; Australian Nuclear Science and Technology Organization (ANSTO); Locked Bag 2001, Kirrawee D.C. NSW 2232 Australia