摘要
新矿物产于云南盈江县的一个铀矿点氧化带,与多种铀矿物共生。该矿物为致密状集合体,黄色,透明至半透明。斜方晶系,空间群C222_1,晶胞参数a=13.73(1),b=15.99(1),c=17.33(2);V=3804(5);Z=8。计算比重4.17。二轴晶负光性,2V计算=83°,α=1.669;β=1.692;γ=1.710。紫外光照射发弱绿黄色荧光。化学成分UO_376.54,P_2O_511.10,K_2O 2.46,CaO 1.57,ThO 0.51,RE_2O_3 0.45,H_2O 7.37%。矿物化学式为(K_(1-x),Ca_x)(UO_2)_3 (PO_4)_2 (OH)_(1+x)·4H_2O,文中还给出X射线粉晶衍射数据。
Yingjiangite occurs in an oxidized zone of the uranium occurrence located in Tongbiguan Village, Yingjiang County, Yunnan Province, China. It is associated with studtite, calcurmolite, tengchongite, autunite, uraninite anduranothorianite. The new mineral appears as massive aggregates. Yellow, transparent to translucent, orthorhombic, space group C222_1, a=13.73 (1), b=15.99 (1), c=17.38 (2), V=3804 (5)~3, Z=8. Calculated density: 4.17g/cm^3. The strongest lines in the X-ray powder pattern: 8.03(10)020, 5.90(4)022, 3.99(9)040, 3.88(4)223, 3.45(4)240, 3.17(7)025, 3.10(7)421, 2.886(6)006, and 2.449(4)245. Biaxial negative 2Vcalc=83°, α=1.669, β=1.692, γ=1.710~ε. Weak green-yellow fluorescence under UV light. Chemical composition: UO_3 76.54, P_2O_5 11.10, K_2O 2.46, CaO 1.57, ThO_2 0.51, REE_2 O_3 0.45, and H_2O 7.37%. Chemical formula: (K_(1-x), Ca_2)(UO_2)_3(PO_4)_2(OH)_(1+x)·4H_2O(x=0.35).
出处
《矿物学报》
CAS
CSCD
北大核心
1990年第2期102-105,T001,共5页
Acta Mineralogica Sinica
关键词
盈江铀矿
新矿物云南
yingjiangite
new mineral
Yunnan Province
