| PrP5O14的晶体结构与铁弹畴 |
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| 引用本文： | 刘书珍,洪广言,胡宁海.PrP5O14的晶体结构与铁弹畴[J].物理学报,1991,40(1):64-69. |
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| 作者姓名： | 刘书珍 洪广言 胡宁海 |
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| 作者单位： | 中国科学院长春应用化学研究所,长春,130022 |
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| 摘 要： | 本文用X射线衍射方法研究了PrP5O14的晶体结构和铁弹相变。晶体空间群为P21/c,晶胞参数a=8.777(1)?,b=9.029(2)?,c=13.068(2)?,β=90.35°(1),z=4,最终R值为0.046。在130±5℃转变成正交晶系,空间群为Pncm,a=8.813(7)?,b=9.075(2)?,c=13.119(10)?。高温相变使晶体产生了铁弹性孪晶,室温下晶体属mmmF2/m类铁弹体。
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| 关 键 词： | PrP5O14 晶体结构 铁弹畴 |
| 收稿时间： | 3/2/1990 12:00:00 AM |
CRYSTAL STRUCTURE AND FERROELASTIC DOMAIN OF PrP5O14 |
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| LIU SHU-ZHEN,HONG GUANG-YAN and HU NING-HAI.CRYSTAL STRUCTURE AND FERROELASTIC DOMAIN OF PrP5O14[J].Acta Physica Sinica,1991,40(1):64-69. |
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| Authors: | LIU SHU-ZHEN HONG GUANG-YAN and HU NING-HAI |
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| Abstract: | The crystal stucture and phase transition of PrP5O14 have been studied by X-ray diffraction methode. The crystal belongs to monoclinic system at room temperature. The structure parameters are as follows: a = 8.777(l)?, b = 9.029(2)?, c= 13.068(2)?, β=90.35°(l), z=4. The space group is P21/c. The final R is 0.046. The monoclinic system transforms to an orthor-hombic phase at 130±5℃. The point-group changes from 2/m to mmm. The monoclinic system contains mmmF2/m ferroelastic domain. The lattice parameters with orthorhombic phase are a = 8.813(7)?, b = 9.075(2)?, c = 13.119(10)?. The space group is Pncm. Finally, the relationship between the crystal structure and ferroelastic behavior are discussed.
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