| Iso-structural phase transition in tetramethylammonium nickel（Ⅱ） nitrite [（CH3）4N][Ni（NO2）3] |
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| 作者姓名： | Li-Hui Kong Da-Wei Fu Qiong Ye Heng-Yun Ye Yi Zhang Ren-Gen Xiong |
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| 作者单位： | Ordered Matter Science Research Center, Southeast University, Nanjing 211189, China |
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| 基金项目： | This work was financially supported by the Project 973 （No. 2014CB848800）, National Natural Science Foundation of China （Nos. 91022003 and 21301029）, Jiangsu Province NSF （No. BK20130600）, Program for NCET and Ph.D. Programs Foundation of Ministry of Education of China （No. 20130092120013）. |
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| 摘 要： | The title compound, tetramethylammonium nickel nitrite [（CH3）4N][Ni（NO2）3], has a hexagonal perovskite-type structure with formula ABX3. It undergoes two reversible phase transitions occurring at about 409.1 and 428.4 K, associated with dielectric transitions. DSC measurement and dielectric measurement confirm the transition. The variable-temperature X-ray structural determinations and the powder X-ray diffraction （PXRD） experiments reveal that this compound has the same space group P3ml （No. 164） at 293 K, 413 K and 438 K. The phase transitions are caused by the rotation of the [（CH3）4N]＋ cation.
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| 关 键 词： | 结构相变 亚硝酸盐 CH3 NO 粉末X射线衍射 标题化合物 镍 钙钛矿型结构 |
| 收稿时间： | 2014-04-08 |
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