摘要
砷铜铅石(Duftite)在1920年首次发现于西南非,其后在墨西哥、美国等地亦有发现。该矿物在我国仅见有简单的报导。1984年笔者在广西德保矿区发现了该种矿物,并进行了矿物学的研究。 一、产状及其共(伴)生矿物 广西德保矿床属矽卡岩型铜—锡矿床,该矿床的铁帽氧化带比较发育,并且在氧化带中发育有多种砷酸盐矿物。砷铜铅石即产在氧化铜矿石中,与孔雀石、硅孔雀石呈互层的皮壳状产出,或产于臭葱石和砷菱铅矾的集合体的晶洞中。共(伴)生矿物有乳砷铅铜石。
Duftite was found in the gossan of the oxidized zone of the Debao Cu-Sn ore deposit in Guangxi. Authors studied the duftite from the physical, the chemical and the X-ray powder analysis. Color dim olive-green to gray-green, streak white, cubic granular or short pillar in form, luster glass to greasy. H= 4, transparent to sub-transparent .D(calc.)= 5. 98, biaxial negative, 2V large. Refractive indice calculated by Graston formula N = 2.003. The main chemical composition by the e-lectron microprobe analysis are CuO 21.38, PbO46 .33, As2O5 31.35, FeO 0.29 (in percentage ),X-ray powder data agree with JCPDS 14-169, and the strong diffraction lines are 3.54 (210) ( 4). 3.24(201)(10). 2.83 (102)( 5 ), 2. 65 (13 1) (7), 2.56 (022) ( 4 ) , 2.29 (212) ( 4 ) , 1.869 ( 5 ) ,1.651 ( 5 ) , 1.532 ( 4 ) , 1.38 4 ( 4 ) . Calculated cell dimensions a=7.894A, b=9.316A, c=6.099A. z = 4, orthorhombic system.
出处
《矿产与地质》
1990年第2期43-45,共3页
Mineral Resources and Geology
