我国甘肃硒汞矿的发现及研究

THE DISCOVERY AND STUDY OF TIEMANNITE IN GANSU, CHINA

硒汞矿产于甘肃省拉尔玛金矿床中,主要共生矿物有石英、重晶石、辉锑矿、黑辰砂、自然金等。硒汞矿呈铅灰色到黑色,金属光泽,性脆。粒度0.01～0.36mm。比重D=8.27,摩氏硬度2.5。电子探针定量分析结果的平均值(%):Hg 71.50,Se 25.21,S 1.88,Au 0.19,Ag 0.07,Te 0.09,As 0.06,Sb 0.04,Fe 0.04,总和99.08。空间群。a=0.6081(1)nm,Z=4。

Tiemannite, a rare mineral in nature, has been discovered in the Larmar gold deposit, Gansu Province, China. Associated minerals include quartz, barite, stibnite, metacinnabar, native gold, etc. The mineral is lead-gray to black in colour, metallic in lustur and brashy. 0.01 to 0.36mm in size, specific gravity D=8.27, Moh's=2.5. Electron microprobe analysis (on average) gave (%): Hg 71.50, Se 25.21, S 1.88, Au 0.19, Ag 0.07, Te 0.09, As 0.06, Sb 0.04 and Fe 0.04, totaling 99.08.The strongest lines in the X-ray diffraction pattern are 3.5121 (100,111), 2.148 (59,220) and 1.832 (36,311). It is of cubic system, with space group T_d^2-F43m; a=0.6081(1)nm, Z=4.