| Crystal Structures of Dy_2(WO_4)_3 and GdY(WO_4)_3 |
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| 引用本文： | SHEN Rong,WANG Cong,WANG Tianmin,DONG Cheng CHEN Xiaolong,and LIANG JingkuiCenter of Material Physics and Chemistry,School of Science,Beijing University of Aeronautics and Astronautics,Beijing 100083,China The Department of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,ChinaInstitute of Physics,Chinese Academy of Science,Beijing 100080,China. Crystal Structures of Dy_2(WO_4)_3 and GdY(WO_4)_3[J]. 稀有金属(英文版), 2003, 22(1) |
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| 作者姓名： | SHEN Rong WANG Cong WANG Tianmin DONG Cheng CHEN Xiaolong and LIANG JingkuiCenter of Material Physics and Chemistry School of Science Beijing University of Aeronautics and Astronautics Beijing 100083 China The Department of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 ChinaInstitute of Physics Chinese Academy of Science Beijing 100080 China |
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| 作者单位： | SHEN Rong，WANG Cong，WANG Tianmin，DONG Cheng CHEN Xiaolong，and LIANG JingkuiCenter of Material Physics and Chemistry，School of Science，Beijing University of Aeronautics and Astronautics，Beijing 100083，China The Department of Materials Science and Engineering，Kunming University of Science and Technology，Kunming 650093，ChinaInstitute of Physics，Chinese Academy of Science，Beijing 100080，China |
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| 基金项目： | ThisworkisfinanciallysupportedbytheNationalNaturalScienceFoundationofChina(No.50002001)，theProvincialNaturalScienceFoundationofYunnan(No.2000E0006Q). |
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| 摘 要： | Two compounds, Dy2(WO4)3 and GdY(WO4)3, were synthesized by using the standard solid state reaction technique. The crystal structure was determined by powder X-ray diffraction and Rietveld refinement method. It is found that both compounds have Eu2(WO4)3-type monoclinic structure, with space group C 2/c, Z = 4. The unit cell parameters of Dy2(WO4)3 are a = 0.75981(1) nm. b = 1.13220( 1) nm, c = 1.13254( 1) nm, and β= 109.8001(3)°, and those of GdY(WO4)3 are a = 0.76175(1) nm, b = 1.13543(1) nm, c = 1.13496(2) nm, and bbbbbbbbbβwhile each rare-earth atom is surrounded by eight oxygen atoms. WO4 tetrahedra share their four vertices with REO8 (RE = Dy, Gd, or Y) trigondodecahedra and some REO8 trigondodecahedra share an edge with each other. The phase transition and the magnetic properties were investigated by differential thermal analysis (DTA) and dc superconducting quantum interference device (SQUID) magnetometer.
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Crystal Structures of Dy2(WO4)3 and GdY(WO4)3 |
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| SHEN Rong,WANG Cong,DONG Cheng,Chen Xiaolong,LIANG Jingkui. Crystal Structures of Dy2(WO4)3 and GdY(WO4)3[J]. Rare Metals, 2003, 22(1) |
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| Authors: | SHEN Rong WANG Cong DONG Cheng Chen Xiaolong LIANG Jingkui |
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| Abstract: | Two compounds, Dy2(WO4)3 and GdY(WO4)3; were synthesized by using the standard solid state reaction tech-nique. The crystal structure was determined by powder X-ray diffraction and Rietveld refinement method. It is found thatboth compounds have Eu2(WO4)3-type monoclinic structure, with space group C 2/c, Z = 4. The unit cell parameters ofDy2(WO4)3 are a = 0.75981(1) nm, b = 1.13220(1) nm, c = 1.13254(1) nm, and β= 109.8001(3)°, and those of GdY(WO4)3are a = 0.76175(1) nm, b = 1.13543(1) nm, c = 1.13496(2) nm, and β= 109.8015(13)°. Each W atom has four oxygen near-est neighbors, while each rare-earth atom is surrounded by eight oxygen atoms. WO4 tetrahedra share their four verticeswith REO8 (RE = Dy, Gd, or Y) trigondodecahedra and some REO8 trigondodecahedra share an edge with each other. Thephase transition and the magnetic properties were investigated by differential thermal analysis (DTA) and dc superconduct-ing quantum interference device (SQUID) magnetometer. |
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| Keywords: | X-ray diffraction Rietveld refinement method crystal structure oxide |
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