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| 題名: | High-temperature, high-pressure hydrothermal synthesis, crystal structures, and spectroscopic studies of a uranium(IV) phosphate (Na10U 2P6O24) and the isotypic cerium(IV) phosphate (Na10Ce2P6O24) |
| 作者: | 李光華;Lai, Yu-Hsien;Chang, Yu-Chih;Wong, Tsz-Fung;Tai, Wan-Ju;Chang, Wen-Jung;Lii, Kwang-Hwa |
| 貢獻者: | 理學院化學學系 |
| 日期: | 2013-12-02 |
| 上傳時間: | 2026-04-21 14:16:46 (UTC+8) |
| 出版者: | American Chemical Society;United States: American Chemical Society |
| 摘要: | 摘要： A uranium(IV) phosphate, Na10U2P6O24, was synthesized under hydrothermal conditions at 570 °C and 160 MPa and structurally characterized by single-crystal X-ray diffraction. The valence state of uranium was established by UV–vis and U 4f X-ray photoelectron spectroscopy. The powder sample has a second-harmonic-generation signal, confirming the absence of a center of symmetry in the structure. The structure contains UO8 snub-disphenoidal polyhedra that are linked to monophosphate tetrahedra by vertex and edge sharing such that a three-dimensional framework with intersecting 12-sided circular and rectangular channels is formed. All 10 sodium sites are situated inside the channels and are fully occupied. This is the first uranium(IV) phosphate synthesized under high-temperature, high-pressure hydrothermal conditions. The isotypic cerium(IV) phosphate, Na10Ce2P6O24, was also synthesized under the same hydrothermal conditions. It is the first structurally characterized Ce(IV) phosphate with a P/Ce ratio of 3. Crystal data of Na10U2P6O24: orthorhombic, P212121 (No. 19), a = 6.9289(3) Å, b = 16.1850(7) Å, c = 18.7285(7) Å, V = 2100.3(2) Å3, Z = 4, R 1 = 0.0304, and wR 2 = 0.0522. Crystal data of Na10Ce2P6O24: orthorhombic, P212121 (No. 19), a = 6.9375(14) Å, b = 16.215(3) Å, c = 18.765(4) Å, V = 2111.0(7) Å3, Z = 4, R 1 = 0.0202, and wR 2 = 0.0529.
其他題名： Inorg. Chem
出版者： United States: American Chemical Society
出版日期： 2013-12-02
出處： Inorganic chemistry, 2013-12, Vol.52 (23), p.13639-13643
資源來源： American Chemical Society Journals
版權： Copyright © 2013 American Chemical Society
識別號： ISSN: 0020-1669
識別號： ISSN: 1520-510X
識別號： EISSN: 1520-510X
識別號： DOI: 10.1021/ic402208s
識別號： PMID: 24224487 |
| 顯示於類別: | [化學學系] 期刊論文
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