1. Applied Chemistry Department, S.V. National Institute of Technology, Surat 395007, Gujarat, India
2. Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organization, Lucas Heights, NSW 2234, Australia
3. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
4. Institute of Chemistry, The University of São Paulo, P. O. Box 26077, 05513-970 São Paulo, SP, Brazil
5. Salt and Marine Chemicals Division, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India