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). New mineral - chrombismite and Jialuite are made under the alkaline hot liquid conditions,suffered the influence of the system compositions' density, especially Cr+6,Jialuite is formed slightly later than chrombismite.The quantity of Bi is higher in gold mineral, for this reason the discovery and study to chrombismite and Jialuite have the important theories' and the actual meaning to find deposit and study in thisgold mine.
出处
《新疆地质》
CAS
CSCD
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
