不同氧分压下系列LaMnO_（3＋λ）化合物的合成与有关结晶学分析

LaMnO_(3+λ) Samples Synthesis and Crystallograph Analysis

不同氧分压下合成单一相ＬａＭｎＯ３＋λ系列样品。利用Ｘ射线衍射数据和未知品系点阵常数计算程序（ＴＲＥＯＲ）测定了其晶体结构，真空样品为四方晶系，其余为三方晶系，且随氧分压升高晶胞参数呈规律性变化，并计算出各位占有率、Ｌａ３＋空位量和非整比结构式。

Series LaMnO3+λsamples were synthsized.x-- ray diffraction data and unknown crystal system program was used to determined the crystal structure sample 1# which synthesis under the vacancy condition was tetragonal, the other were trigonal,with oxygen pressure increase, the unit cell parameter change in regulation We also calculated the La3+emptiness site and B-site occupancy and structure