1. Minerals Section, Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, India;
2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India;
3. Department of Earth and Space Sciences, Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, India;
4. Geological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, India