| Title | 六方类钙钛矿体系La2Ca2MnO7-Sm2Ca2MnO7的结构变化和相关系 |
| Other Titles | Structure Variation and Phase Relationship of the Hexagonal Perovskite System La2Ca2MnO7-Sm2Ca2MnO7 |
| Authors | 别利剑 李国宝 廖复辉 林建华 |
| Affiliation | 北京大学化学与分子工程学院,稀土材料化学与应用国家重点实验室,北京,100871 临沂师范学院化学系,临沂,276005 北京大学化学与分子工程学院,稀土材料化学与应用国家重点实验室,北京,100871 |
| Keywords | 六方类钙钛矿 夹层化合物 锰酸盐 固体化学 hexagonal perovskite intergrowth compound manganate solid state chemistry |
| Issue Date | 2003 |
| Publisher | 高等学校化学学报 |
| Citation | 高等学校化学学报.2003,24,(5),753-756. |
| Abstract | 利用柠檬酸盐前驱物法制备了La2-xSmxCa2MnO7系列样品, 并利用Rietveld方法对结构进行了精修. 结果表明, 体系中存在两个单相区(x≤0.8和x≥1.0)和一个两相区(0.8＜x＜1.0). 体系的这种结构变化可以用稀土离子的半径变化说明. La2-xSmxCa2MnO7 samples were prepared from citric acid sol-gel precursor by using solid state reaction. The cell parameters of the sample were refined by using Rietveld method, which evidence the presence of single-phase regions(x less than or equal to 0.8 and x greater than or equal to 1.0) and two-phase region 0.8 < x < 1.0. The structure variation of the system can be understood by considering the ionic size of rare earth cation. |
| URI | http://hdl.handle.net/20.500.11897/80661 |
| ISSN | 0251-0790 |
| DOI | 10.3321/j.issn:0251-0790.2003.05.001 |
| Indexed | SCI(E) 中文核心期刊要目总览(PKU) 中国科技核心期刊(ISTIC) 中国科学引文数据库(CSCD) |
| Appears in Collections: | 化学与分子工程学院 稀土材料化学与应用国家重点实验室 |
