人工晶体(Bi_(38)CrO_(60))——驾鹿矿在自然界的首次发现及矿物成因和地质意义  

ARTIFICIAL CRYSTAL (Bi_(38)CRO_(60))-THE DISCOVERY OF JIALUITE MINERALIZATION AND IT’S GEOLOGIC SIGNIFICANCE

作　　者：周新春[1] 袁周伟 贾小梅[1] 王开崎 王利兴[1] 李广文[1] 刘良[2] 舒桂明[3] 徐平[4] 翟明国[4] 

机构地区：[1]中国人民武警部队黄金八支队,新疆乌鲁木齐830057 [2]西北大学,陕西西安710069 [3]北京大学,北京100871 [4]中国科学院地质与地球物理研究所,北京100028

出　　处：《新疆地质》2005年第1期41-49,共9页Xinjiang Geology

基　　金：黄金指挥部科研项目(HJ96-2-4);陕西省教委科学基金资助

摘　　要：1983年,ZhitomirsKii等人在实验室条件下合成了四方晶体Bi16CrO27和立方晶体Bi38CrO60.它们在自然界首次发现于中国陕西省洛南县驾鹿金矿床中,分别被命名为铬铋矿(Bi16.006Cr0.997O27)和驾鹿矿(Bi38.008Cr0.996O60).驾鹿矿较铬铋矿形成较晚,其共生、伴生矿物有黄铜矿、自然金、碲金矿、含氧金矿物、石英等.常呈不规则粒状集合体,偶见<0.05mm立方体微晶,棕黑色,金属光泽;平均维克硬度Hv=232.78kg/mm2,平均摩氏硬度Hm=4.15;实测密度D=14.10(3)g/cm3,计算密度Dx=14.08(2)g/cm3,折射率n=3.14(3).采用2种电子探针进行波谱定量分析的成分及计算的化学式分别是:①EPM8100分析的结果:w(Bi2O3)为98.854%、w(CrO3)为1.111%,总和为99.965%;化学式为Bi38.009Cr0.995O60;②CAMEBAX-SX51分析的结果:w(Bi2O3)为98.862%,w(CrO2)为1.112%,总和为99.974%;化学式为Bi38.008Cr0.996O60.均可写为Bi38CrO60.2种仪器测定的结果非常接近,说明所测定的化学成分和计算的化学式是十分可靠的.X-射线粉晶分析主要强线d(I)(hkl)分别为:0.3215(100),(310);0.27211(72),(321);0.17145(40),(530);0.1696(30),(600);0.1651(30),(611);0.1608(30),(620);0.29411(25),(222);0.3596(22),(220);0.2171(20),(332);0.1503(20),(631);0.1996(18),(The square crystal Bi16CrO27 and the cubic crystal Bi38CrO60 synthesized two artificial crystals under the laboratory term by the scholar ZhitomirsKii ID, etal in 1983 are discovered for the very first time at nature to Jialuite gold mine inChinese Shaanxi province luonan County.They are named differently chrombismite(Bi16.006Cr0.997O27) and Jialuite (Bi38.008Cr0.996O60).Jialuite formed later than chrombismite, it is closely associated with chalcopyrite,nature gold, calaverite,oxygen-bearing gold mine-ral,quartz etc. Jialuite appears as irregular grained aggregates,the cubic crystalsare rare<0.05mm,brownish black,metalsluster;Hv=232.78 kg/mm3;HM=4.15;measured densityD=14.10(3) g/cm3,computed density Dx=14.08(2) g/cm3;refractive index n=3.14(3).The comp-ositions and the chemistry type to adopt two electron microprobe to proceed spectrum quantitative analysis is respectively:①in EPM8100:Bi2O3 is 98.854 %,CrO3 is 1.111 wt%,total 99.965 wt%;The chemistry type is Bi38.009Cr0.995O60;②in CAMEBAX- SX51:Bi2O3 is 98.862 %,CrO2 is1.112 wt%,total 99.974 wt%,the chemistry type is Bi38.008Cr0.996O60.Both can write Bi38CrO60.The result measured by two kinds of instruments is very nearly, it appears that the chemistry composition and the chemistry type is very dependable.The mainand strong line d(I)( hkl) in X- ray crystallography analysis respectivelyis: 0.3215(100),(310); 0.27211(72),(321);0.17145(40),(530);0.1696(30),(600);0.1651(3 0),(611);0.1608(30),(620); 0.29411(25), (222); 0.3596(22), (220);0.2171(20),(332);0.1503(20),(631);0.1996(18),(510);0.2401(13),(330);0.2275(13),(420);0.1217(12),(653);0.1184(12) ,(750); 0.1858(10), (521), the possible space cluster is Im3m;a=1.0181(1) nm,c/ a=1, crystall volume V =1.05529(1) nm3, Z=1. 1- Kp/Kc=0.019. Cr+6, Bi+3, O-2. Consistence in composition and X-ray crystal quantity of Jialuite and artificial crystal ( Bi38CrO60), well proves Jialuite is the very first time at natural discovery for an artificial crystal( Bi38CrO60). Ne

关 键 词：首次发现 人工晶体 自然界 地质意义 矿物成因 鹿 化学成分 X-射线 实验室条件 含氧金矿物 化学式 立方晶体 四方晶体 伴生矿物 金属光泽 摩氏硬度 定量分析 电子探针 仪器测定 晶胞体积 热液条件 实际意义 金矿床 铋矿 

分 类 号：P618.2[天文地球—矿床学]