【摘要】 <正> 硅孔雀石是铜矿床氧化带中常见的次生含水的铜硅酸盐矿物,现经研究表明,水在其中主要是以羟基形式存在,而呈中性水分子形式存在的水却居于次要地位,同时,后者的含量是不固定的。因此,该矿物的一般通式写为（Cu,Al）₂ H₂（Si₂O₅）（OH）₄或H₂Cu₂（Si₂O₅）（OH）₄·nH₂O（M. Fleischer,1980）。应当还要提到的是,在矿物学文献中,还有水硅孔雀石（asperolite）一词,它（水硅孔雀石）是1966年由R.海更多还原

【Abstract】 A blue-green mineral was found in the oxidized zone from a copper-bearing basalt. Our Studies indicate that it is a water-bearing copper silicate mine- ral-chrysocolla. The chrysocolla occurs as irregular grain, from 0.5 to 2mm in diamter. It is green or bluish-green in colour, with luster on the fracture surface. No cleavage is observed. It has specific gravity of 3.013 and hardness of 2--2.5. Under the microscope, chrysocolla is translucent and it is from colourless to buish-green, weakly pleochroic. The mineral is biaxial crystal and negative, with Ng=1.592, Nm=1.588, Np=1.570, N_N=0.022,（-）2v=60（obsd）. The Chemical compositions of chrysocolla are SiO₂ 31.70, CuO 44.68, AL₂O₃34,MgO 0.16,CaO 0.01,H₂O⁺13.85, H₂O^-8.73, amounting to 100.47. The crystallo-chemical formula of chrysocolla calculated for cation=6 is: H_1.6 Cu_2.03 [(Si_1.92Al_0.092.01O₅]（OH）₂. The strongest X-ray powdes lines are 4.452（3）, 2.848（10）, 2.491（4）, 1.632 （8）, 1.428 （8）, 1.344（7）. It is turnedinto tenorite and quartz+tenorite after heated to 850℃-960℃. Curves of IR and DTA of chrysocolla are also given in this paper.更多还原