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氟碳铈钡矿是1964年首次在我国内蒙白云鄂博铌钽稀土铁矿床中发现的一种钡—稀土氟碳酸盐矿物,其理想的化学式为Ce_2Ba_3(CO_3)_5F_2。由于组成中轻重原子十分悬殊,Ba和Ce对X射线的散射能力又十分接近,因此,它的真实结构一直未能用实验的方法准确测定。这次我们使用RASA—5RP高功率四圆单晶衍射仪对作者于1986年从白云鄂博西矿区采集的标本成功地进行了单晶结构分析,精确测定了它的晶胞参数:a_0=21.338(3),b_0=5.0666(8),c_0=13.276(9)(?),β=94.76(4)~0,V=1430(?)~3,空间群P_2。用F>5σ(F)的
The bastnaesite is the first barium-rare earth fluorocarbon mineral discovered in 1964 for the first time in the Baiyun Obo niobium tantalum rare earth iron ore deposit in Inner Mongolia. Its ideal chemical formula is Ce2Ba3 (CO3) 5F2. Due to the composition of light and heavy atoms is very poor, Ba and Ce on the X-ray scattering ability is very close, so its true structure has not been able to accurately determine the experimental method. This time we used the RASA-5RP high power four-crystal single-crystal diffractometer to successfully analyze the single-crystal structure of the specimen collected by the author from the Baiyunebo West Mining Area in 1986 and accurately measured its unit cell parameters: a_0 = 21.338 ( 3), b_0 = 5.0666 (8), c_0 = 13.276 (9) (?), Β = 94.76 (4) ~ 0, V = 1430 (?) ~ 3 and space group P_2. Use F> 5σ (F)