摘要
本文用改进的尝试法成功地对未知晶系的Li_4UO_2(CO_3)3粉末晶体的X射线衍射数据指标化,该尝试法亦适用于六方、四方、正交、单斜和三斜晶系,根据指标化结果,得到该晶体的点阵参数,该点阵参数最后用最小二乘方作了精化。本文报导了五个重要结果:第一,Li_4UO_2(CO_3)3粉末晶体的X射线衍射数据指标化结果。第二,该晶体属于单斜晶系。第三,它们的晶胞参数是α=11.733(32),b=9.334(10)c=9.764(25),β=103.80(24)。第四,z=4,D_(cal)=3.056,D_(obs)=3.080,品质因数为7.3,⊿sin^2θ<0.00045第五,它的空间群属于10-c_(2h)~1-p(2/m)、3-c_2~1-p^2或6-c_3~1-pm。
The X-ray diffraction values of powder speoimens of unknown orystal system of lithium uranyl tricarbonate have been indexed successfully with the improved trialand error method. Results show that the crystal of Li_4UO_2(CO_3)_3 belongs to monoclinie system, its space group belongs to 10-c_(2h)~1-p(2/m), 3-c_2~1 or 6-c_3~1-pm,. The cell parameters are as follows: a=11. 733(32), b=9.334(10), e=9.764(25), β=103.80(24)°, Z=4, D_(cal)=3.056, D_(obs)=3.080, the figure of merit is equal to 7.3 ⊿sin^2θ<0.00045.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
1989年第3期61-64,共4页
Journal of East China Normal University(Natural Science)
基金
国家自然科学基金
关键词
三碳酸盐
X射线
铀酰
衍射
indexing X-ray diffraction Iithium uranyl triearbonate
