摘要
内蒙古白云鄂博的氟碳钙铈矿,经电子衍射研究,观察到三种多型:4H,P6α=7.12 c~=56.4 ;6R,R3α=7.12 c~=84.6 ;3R,R3α=7.12 c~=42.3 。其中4H 为新多型。湖北竹山氟碳钙铈矿仅观察到一种多型6R。白云鄂博样品中发现3R 与6R 共晶格取向连生,以及3R 型共格双晶。
The study on electron diffraction of bastnaes ite from Bayan Obo,Nei Mongol, permits us to find three politypes of the mineral:4H,P6:a=7.12.,c=56.4; 6R,R3:a=7.12,c=84.6;3R,R3:a=7.12,c=42.3.Among them the 4H is a new politype.For basnaesie from Zhushan,Hubei Province,only a politype 6R was observed,in samples from Bayan Obo an eutectic-oeriented intergrowth of 3R and 6R was found,and the eutectic twin of 3R type was observed.
出处
《地质科学》
CAS
CSCD
北大核心
1992年第1期20-25,T001,共7页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家教委博士学科点专项科研基金赞助
关键词
氟碳钙铈矿
电子衍射
多型
晶格
Bastnaesite
Bayan Obo
Zhushan
Politype
Eutectic-oriented intergrowth
