摘要
本文第一次提供了由单晶X射线衍射分析测定的盈江铀矿的空间群和晶胞参数。该矿物产于广东省下庄铀矿田。斜方晶系,空间群Bmmb(63),a=15.707(3),b=17·424(3),c=13.692(2)?,V=3747?~3,Z=4。Dc=4.60g/cm^3,Dm=4.54g/cm^3。化学式:(K_2,Ca)(UO_2)_7(PO_4)_4(OH)_6·6H_2O。二轴晶,负光性。2Vc=36°,2Vm=36—38°。Ng=1.707(2),Nm=1.703(2),Np=1.666(1)。光性方位:Ng//Y,Nm//X,Np//Z。
The space group and unit cell of yingjiangite from the Xiazhuang ura-nium deposit, Guangdong Province, have been determined for the first timeby single-crystal X-ray diffraction analysis. Its unit cell is orthorhombic,space group Bmmb (63), a= 15.707 (3), b= 17.424 (3), c= 13.692(2)A. V=3747 A^3. Z= 4.Dc== 4.60g/cm^3, Dm= 4.54g/cm^3. Chemical formula: (K_2, Ca)UO_2)_7(PO_4)_4 (OH)_6 6H_2O. Biaxial negative with 2 Vc= 36°, 2 Vm= 36--38°,Ng= 1.707 (2), Nm= 1.703 (2), Np= 1.666 (1). Optical orientation: Ng ∥ Y,Nm ∥ X and Np ∥ Z.
出处
《岩石矿物学杂志》
CAS
CSCD
1992年第2期178-184,共7页
Acta Petrologica et Mineralogica
关键词
铀矿
X射线衍射
空间群
晶胞参数
Yingjiangite
Single-crystal X-ray diffraction analysis space group
