Local structure analysis of Bi2(Ga1-xFex)4O9 mullite-type solid solutions synthesized via combination of ball milling and thermal treatment |
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| Institution: | 1. State University of Maringá, Av. Colombo, 5790, 87020-900, Maringá, Brazil;2. Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001, Ko?ice, Slovakia;3. Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany;4. Federal Technological University of Paraná, Av. Alberto Carazzai, 1640, 86300-000, Cornélio Procópio, Brazil;5. Institute of Physical and Theoretical Chemistry, Braunschweig University of Technology, Rebenring 56, 38106, Braunschweig, Germany;1. Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;2. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China;1. UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey;2. Department of Polymer Science and Technology, Middle East Technical University, Ankara 06800, Turkey;3. Institute of Materials Science & Nanotechnology, Bilkent University, Ankara 06800, Turkey;1. Department of physics, New Horizon College of Engineering, New Horizon College of Engineering, Bangalore, 560103, India;2. Department of Physics,East Point college of Engineering and Technology,Bangalore. 049, India;3. Department of Science, East West Institute of Technology East West Institute of Technology, Bangaluru, 560091, India;1. Advanced Technology Institute, Department of Electronic Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom;2. Toyota Technological Institute, 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan;1. Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001 Ko?ice, Slovak Republic;2. Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;3. Department of Physics, State University of Maringá, Av. Colombo 5790, 87020-900 Maringá, Brazil;4. Faculty of Science and Technology, Keio University, 223-8522 Yokohama, Japan;5. Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3-3a, 30167 Hannover, Germany;6. Center for Solid State Chemistry and New Materials, Leibniz University Hannover, Callinstr. 3-3a, 30167 Hannover, Germany;7. Institute of Physics, Faculty of Mining and Geology, V?B?Technical University of Ostrava, 70833 Ostrava, Czechia;1. Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, I-50121 Firenze, Italy;2. CNR – Istituto di Geoscienze e Georisorse, Sezione di Firenze, Via La Pira 4, I-50121 Firenze, Italy;3. Department of Petrology, Geological Faculty, Moscow State University, Leninskie Gory, 119234, Moscow, Russia;4. Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan;5. Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan |
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| Abstract: | Mullite-type Bi2(Ga1-xFex)4O9 solid solutions, with 0.1 ≤ x ≤ 0.9, have been synthesized by a combination of mechanical and thermal treatments of a Bi2O3/Ga2O3/α-Fe2O3 stoichiometric mixture. The microstructure of the as-prepared materials on the long-range and local atomic scales was investigated by X-ray diffraction and 57Fe Mössbauer spectroscopy, respectively. The XRD data analysis revealed in all cases linear dependence of the lattice parameters related on x. Due to the ability of the applied Mössbauer spectroscopy to probe the local environment of Fe cations, the local structural disorder in investigated solid solutions is provided. It was shown that the presence of Fe3+ cations in octahedral sites of the orthorhombic structure causes a local distortion of polyhedra in the material. The preferential occupation of Fe in octahedral site was revealed. Detailed quantitative information on both the cation distribution and the bond lengths provided is discussed in relation to the derived hyperfine parameters. |
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| Keywords: | Mullite-type solid solution Bismuth-bearing complex oxide Rietveld analysis Mössbauer spectroscopy |
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