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| Title: | HYDROTHERMAL FORMATION OF NOVEL CERIUM MATERIALS WITH OPEN-FRAMEWORK ARCHITECTURES | |
| DOI No: | 10.1142/9789812776846_0035 | |
| Source: | FRONTIERS OF SOLID STATE CHEMISTRY (pp 257-264) | |
| Author(s): | RANBO YU
Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511, Japan Institute for Chemical Research (ICR), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan DAN WANG Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511, Japan Research Institute of Innovative Technology For the Earth (RITE), 9-2 Kizugawada, Kizu-cho, Soraku-gun, Kyoto 619-0292, Japan TAKAHIRO TAKEI Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511, Japan NOBUHIRO KUMADA Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511, Japan NOBUKAZU KINOMURA Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511, Japan MIKIO TAKANO Institute for Chemical Research (ICR), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan |
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| Abstract: | Two novel open-framework cerium materials, cerium phosphate fluoride (NH4)[CeIVF2(PO4)] (I), cerium oxyfluoride H25.5(NH4)10.5Ce9O27F18 (II), have been synthesized under hydrothermal conditions, and characterized by means of single-crystal X-ray diffraction, ion chromatography analysis, infrared spectroscopy, and thermal analysis. In these compounds, two kinds of cerium-centered polyhedra CeO4F4 and CeO6F2 are incorporated into the structures as novel basic building units. The structure of (I) contains corrugated chains along the b-axis formed by CeO4F4 polyhedra link via Ce2F2 rings, and these chains are tetrahedrally connected via PO4 groups to create the 3-D network with 1-D channel. In the structure of compound (II), six CeO6F2 dodecahedra link to form an octahedral Ce6O24F12 cage, which connect one another via bridging oxygen atoms to give rise to a three-dimensional channel system with eight-ring pore opening. Both of these two compounds accommodate NH4+ cations at the intersection of the channels to balance the framework negative charge. | |
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