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我们发现的镉银黝铜矿产于青海省锡铁山铅锌矿床氧化带中,颗粒细微,最大颗粒为30μm,一般为2—5μm,平均颗粒为3μm。4个颗粒的电子探针分析结果(％)是:Ag15.582—17.503,平均16.863; Cu22.419—23.555,平均22.802;Cd9.042—11.966,平均10.748;Zn0.175—1.007,平均0.516;Fe0.050—1.528,平均0.426;Sb24.970—26.247,平均25.691;As0.871—1.216,平均0.988;S20.960—21.823,平均21.507。根据平均化学成分计算的分子式为;(Cu_(6.95)Ag_(3.03))_(9.98)(Cd_(1.86)Zn_(0.15)Fe_(0.15))_(2.15)(Sb_(4.09)As_(0.25))_(4.34)S_(13),简化式为Cu_(10)Cd_2Sb_4S_(13)。
The cadmium silver tetrahedrite we found is produced in the oxidation zone of the Xieshan lead-zinc ore deposit in Qinghai Province with fine particles of 30μm, usually 2-5μm, and average particle size of 3μm. Electron probe analysis results for 4 particles (%) were: Ag15.582-17.503 with an average of 16.863; Cu22.419-23.555 with an average of 22.802; Cd9.042-11.966 with an average of 10.748; Zn0.175-1.007 with an average of 0.516; Fe0.050-1.528 with an average of 0.426; Sb24.970-26.247 with an average of 25.691; As0.871-1.216 with an average of 0.988; and S20.960-21.823 with an average of 21.507. The calculated molecular formula based on the average chemical composition is: (Cu_ (6.95) Ag_ (3.03)) _ (9.98) (Cd_ (1.86) Zn_ (0.15) Fe_ (0.15)) _2.15 (Sb_ (4.09) As_ ) _ (4.34) S_ (13), the simplified formula is Cu_ (10) Cd_2Sb_4S_ (13).