我国首次发现的锌-砷黝铜矿  

The First Discovery of Zn-Tennantite in China

作　　者：雷蕴芬[1] 林月英[1] 张德全[1] 余静[1] 

机构地区：[1]中国地质科学院矿床地质研究所

出　　处：《岩石矿物学杂志》1991年第2期176-180,共5页Acta Petrologica et Mineralogica

摘　　要：锌-砷黝铜矿产于内蒙的某一铅锌矽卡岩矿床中,呈它形粒状集合体,粒径0.2-0.5mm,铅灰色,硬度HvHN=339-388kg/mm2。反射色呈灰蓝色微带绿色。均质性。其成分经电子探针分析(平均值)为:S 25.94,As 10.70,Cu 39.67,Zn 7.36,Sb 9.81,Bi 5.81,Ag 0.18,Fe 0.37(%),化学式为:(Cu10.02Age03)10.05(Zn1.81Fe0.11)1.82(As2.29Sb1.29Bi0.45)4.03S18。X射线分析:晶胞参数a=10.322,粉末衍射强线是2.98,1.82,1.56。Zn-tennantite is a rare mineral discovered in a skarn lead-zinc deposit in Inner Mongolia. The associated minerals include chaleopyrite, sphalerite and galena. Zn-tennantite occurs as xenomorphic granular aggregates 0.2-0.5mm in diameter. It is lead grey in color, H_(VRN)=339-388 kg/mm^2.Under microscope reflection color is greyish blue with a faint greenish tint.Electron microprobe analysis gives S 25.94, As 10.70, Cu 39.67, Zn 7.36, Sb 9.81, Bi 5.81,Ag 0.18 and Fe 0.37. The calculated chemical formula is (Cu_(10.02) Ag_(0.03))_(10.05) (Zn_(1.81)Fe_(0.11))_(1.92)(As_(2.29)Sb_(1.29)Bi_(0.45))_(4.03)S_(13), quite similar to the ideal formula (Cu, Ag)_(10) (Zn, Fe)_2 (Sb, As)_4S_(13).The x-ray powder pattern of Zn-Tennantite is identical with that of tetrahedrite. Unit cell parameter a_0=10.322(). The strongest lines in the powder diffraction pattern are 2.98(), 1.82()and 1.56().It is smaller than tetrahedrite.

关 键 词：黝铜矿 硫盐矿物 锌-砷 内蒙 

分 类 号：P578.294[天文地球—矿物学]