典型文献
Haitaite-(La),LaU4+Fe3+2(Ti13Fe2+4Fe3+)Σ18O38,a New Member of the Crichtonite Group
文献摘要：
Haitaite-(La),(La,Ce)(U4+,U6+,Fe2+)(Fe3+,Al)2(Ti,Fe2+,Fe3+)18O38,is a new member of the crichtonite group.It is named after the Haita Village in the Miyi County of Sichuan Province,China,where the mineral was discovered.The mineral occurs as black opaque centimeter-sized aggregates in the external contact zone between the Neoproterozoic(～800 Ma)alkali feldspar granite and the Mesoproterozoic(～1700 Ma)micaschist.In the studied sample,haitaite-(La)is associated with other minerals,including ilmenite,magnetite,rutile,zircon,brannerite and uraninite.The new mineral is a black,metallic phase and has a Mohs hardness of 6,with a density of 4.99 g/cm3(calculated)and 5.03 g/cm3(measured).Haitaite-(La)is opaque in transmitted light and grayish-white under reflected light,with a reflectivity between 22.5％and 16.42％in the 400-700 nm band(SiC,in the air).The compositions of the mineral were measured by EPMA,the U4+/U6+ratio was determined by X-ray photoelectron spectroscopy and the Fe2+/Fe3+ratio was determined by M?ssbauer spectroscopy.Haitaite-(La)is trigonal,belongs to R(3-)and has unit-cell parameters a=10.3678(5)?,c=20.8390(11)?,V=1939.9(2)?3,Z=3.The crystalline structure is composed of octahedra with 9 layers of close-packed octahedra(M1,M3,M4,M5),tetrahedra(M2)and contains large 12-coordinated M0 sites.
文献关键词：
中图分类号：
作者姓名：
WANG Fenggang;FAN Guang;LI Ting;GE Xiangkun;WU Yu;WANG Tao;YAO Jian
作者机构：
Beijing Research Institute of Uranium Geology,Beijing 100029,China;Research Institute 280,CNNC,Guanghan,Sichuan 618300,China
文献出处：
引用格式：
[1]WANG Fenggang;FAN Guang;LI Ting;GE Xiangkun;WU Yu;WANG Tao;YAO Jian-.Haitaite-(La),LaU4+Fe3+2(Ti13Fe2+4Fe3+)Σ18O38,a New Member of the Crichtonite Group)[J].地质学报（英文版）,2022(06):2007-2014
A类：
Haitaite,LaU4+Fe3+2,Ti13Fe2+4Fe3+,18O38,Crichtonite,crichtonite,Haita,Miyi,micaschist,haitaite,brannerite,uraninite,grayish,U6+ratio,Fe3+ratio
B类：
New,Member,Group,Ce,new,member,group,It,named,after,Village,County,Sichuan,Province,China,where,was,discovered,occurs,black,opaque,centimeter,sized,aggregates,external,contact,zone,between,Neoproterozoic,Ma,alkali,feldspar,granite,Mesoproterozoic,In,studied,sample,associated,other,minerals,including,ilmenite,magnetite,rutile,zircon,metallic,phase,Mohs,hardness,density,cm3,calculated,measured,transmitted,light,white,under,reflected,reflectivity,band,SiC,air,compositions,were,by,EPMA,determined,photoelectron,spectroscopy,ssbauer,trigonal,belongs,unit,cell,parameters,crystalline,structure,composed,octahedra,layers,close,packed,M1,M3,M4,M5,tetrahedra,M2,contains,large,coordinated,M0,sites
AB值：
0.495324
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
