摘要
本文研究的氟碳铈矿产于四川牦牛坪大型稀土矿床中,呈六方自形—半自形板状、柱状、他形粒状,粒度0.1—10mm。矿物为淡黄色,实测比重4.909—5.051。薄片中呈无色、淡黄色,一轴晶(+),N_0=1.719 0—1.738,矿物主要成分(W(B)/%):MREO74.40—77.66,CO_214.90—16.40,F 5.90—6.90.矿物稀土配分属富MCe的强选择配分型,MCe_2O_3占稀土总量的99%以上。对矿物进行热重分析、红外光谱分析和X射线衍射分析,其晶胞参数a,b 0.711 49—0.713 99nm,c O.976 20—0.978 29nm,c/a 1.369 8—1.371 4,V 0.427 95—0.431 89 nm^3.
The article deals with the bastnaesite which occurs in the large-scaled RE deposit located in the North of Xichang, Sichuan. The bastnaesite takes hexagonal euhedral to subhedral plate,prism,and anhedral grain with particle size 0.1—10 mm. The bastnaesite is yellow, with measured specific gravity 4.909—5.051. The thin section of the bastnaesite of colourless,light yellow,uniaxial crystals( + ) ,and N_0 =1.719 0—1.738. The chief chemical composition of the bastnaesite is W(∑REO) 74.40—77.66%,W(C0_2)14.90—16.40%,W(F)5.90—6.90%. The RE pattern type of the bastnaesite belongs to strong selection pattern type with rich ∑Ce. ∑Ce_2O_3 is more than 99% of the total RE in weight. The bastnaesite has undertaken TGA, infrared speatroscopy,and X-ray analysis,its unit cell parameters a,b 0.71149—0.71399 nm, c 0.97620—0.97829 nm ,c/a 1.3696—1.3714, V 0.42795—1.43199 nm^3.
出处
《矿物岩石》
CAS
CSCD
1993年第3期42-47,共6页
Mineralogy and Petrology
关键词
氟碳铈矿
化学成分
晶胞
稀土族
bastnaesite
REE
chemical composition
unit cell parameter
