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Synthesis and crystal structure of K2NiF4-type novel Gd1+xCa1-xAlO4-xNx oxynitrides
| Title: | Synthesis and crystal structure of K2NiF4-type novel Gd1+xCa1-xAlO4-xNx oxynitrides |
| Authors: | Masubuchi, Yuji Browse this author →KAKEN DB | | Hata, Tomoyuki Browse this author | | Motohashi, Teruki Browse this author | | Kikkawa, Shinichi Browse this author |
| Keywords: | Inorganic materials | | Rare earth alloys and compounds | | Solid state reactions | | Crystal structure | | Synchrotron radiation | | X-ray diffraction |
| Issue Date: | 5-Jan-2013 |
| Publisher: | Elsevier science sa |
| Journal Title: | Journal of alloys and compounds |
| Volume: | 582 |
| Start Page: | 823 |
| End Page: | 826 |
| Publisher DOI: | 10.1016/j.jallcom.2013.08.140 |
| Abstract: | Novel gadolinium calcium aluminum oxynitrides, Gd1+xCa1-xAlO4-xNx, were prepared in x = 0.15-0.25 by the solid state reaction of a nitrogen-rich mixture with AlN as an aluminum source; the mixture was sintered twice at 1500 degrees C for 5 h under 0.5 MPa of nitrogen gas. Shift in the optical absorption edge was observed in their diffuse reflectance spectra from 4.46 eV for the oxide (x = 0) to 2.94 eV for the oxynitride at x = 0.2. The crystal structure of Gd1.2Ca0.8AlO3.8N0.2 at x = 0.2 was refined using a synchrotron X-ray diffraction data as a layered K2NiF4-type structure with the I4mm space group. Longer Al-O/N bond lengths in the oxynitride than those in GdCaAlO4 suggest that the nitride ions are in the apical site of aluminum polyhedron, similar to those in Nd2AlO3N. (c) 2013 Elsevier B.V. All rights reserved. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/54928 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 鱒渕 友治
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