caa a22 4500 605545235 CHVBK 20210128100935.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00723-014-0613-8 doi (NATIONALLICENCE)springer-10.1007/s00723-014-0613-8 EPR and Optical Studies of Fe3+-Doped Ca-Li Hydroxyapatite Nanopowder: Mechanochemical Synthesis [Elektronische Daten] [K. Ravindranadh, B. Babu, Ch. Venkata Reddy, Jaesool Shim, M. Rao, R. Ravikumar] Fe3+-doped Ca-Li hydroxyapatite (CLHA) nanopowders were prepared by mechanochemical synthesis and characterized by different spectroscopic techniques. Powder X-ray diffraction data revealed that the crystal structure belongs to hexagonal and its lattice cell parameters, average crystallite sizes were evaluated. The morphologies of the prepared samples were analyzed by using scanning electron microscopy and transmission electron microscopy studies. Optical and electron paramagnetic resonance data confirmed that the doped Fe3+ enter into host material as distorted octahedral symmetry. Photoluminescence studies of Fe3+-doped CLHA nanopowders exhibit ultraviolet and blue emission bands. Commission Internationale de L'Eclairage chromaticity coordinates were also calculated from emission spectra of Fe3+-doped CLHA nanopowders. Vibrational bands related to phosphate molecules, P-O-H and hydroxyl ions are observed in the FT-IR spectra. Springer-Verlag Wien, 2014 Ravindranadh K. Department of Physics, Andhra Loyola College, 520 008, Vijayawada, India aut Babu B. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Venkata Reddy Ch School of Mechanical Engineering, Yeungnam University, 712-749, Gyeongsan, Republic of Korea aut Shim Jaesool School of Mechanical Engineering, Yeungnam University, 712-749, Gyeongsan, Republic of Korea aut Rao M. Department of Physics, Andhra Loyola College, 520 008, Vijayawada, India aut Ravikumar R. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Applied Magnetic Resonance Springer Vienna 46/1(2015-01-01), 1-15 0937-9347 46:1<1 2015 46 723 https://doi.org/10.1007/s00723-014-0613-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-014-0613-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ravindranadh K. Department of Physics, Andhra Loyola College, 520 008, Vijayawada, India aut NATIONALLICENCE 700 1- Babu B. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 700 1- Venkata Reddy Ch School of Mechanical Engineering, Yeungnam University, 712-749, Gyeongsan, Republic of Korea aut NATIONALLICENCE 700 1- Shim Jaesool School of Mechanical Engineering, Yeungnam University, 712-749, Gyeongsan, Republic of Korea aut NATIONALLICENCE 700 1- Rao M. Department of Physics, Andhra Loyola College, 520 008, Vijayawada, India aut NATIONALLICENCE 700 1- Ravikumar R. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/1(2015-01-01), 1-15 0937-9347 46:1<1 2015 46 723