论文部分内容阅读
蔡承云石产于四川省会东县的铅 锌矿床氧化带 ,与之共生的是铁的氢氧化物和水云母类的粘土矿物等 ,矿床的主要金属矿物是方铅矿、闪锌矿、黄铁矿和少量黄铜矿等 .蔡承云石呈灰白色、纤维状、毛发状 ,具玻璃光泽 ,密度为 2 2 0g/cm3,硬度为 1 .5～ 2 .0 ,易溶于水 ,在显微镜下为无色 ,无多色性 ,在温度为 2 2℃时测得其 3个光学主轴的参数为Ng=1 .480 5 ,Nm=1 .4775 ,Np=1 .475 6 ;用常规的化学方法分析蔡承云石的化学成分 ,其成分质量分数分别为 :FeO ,1 6 .1 5 % ;Al2 O3,7.90 % ;SO3,33 .96 % ;H2 O+ ,37.64 % ;H2 O- ,3 .56 % ;不溶物 ,0 .32 % .以S的原子数为 1时计算出蔡承云石的化学式为Fe2 + 3Al2 (SO4 )·30H2 O ;蔡承云石强X射线结果为 :5 .494(1 4 ,1 2 1 ) ,4.886(1 0 0 ,1 31 ) ,4.0 30(9,0 60 ) ,3 .776(2 1 ,1 2 4 ) ,3 .50 4 (9,1 1 5) ,3 .2 52 (1 3 ,0 36) ,2 .72 7(1 2 ,2 0 5) ,1 .863(8,2 2 9) ,属单斜晶系 ,晶胞参数a =0 .763nm ,b =2 .41 3nm ,c =2 .2 64nm ,β =1 1 1 .0 6° ,Z =4.
Cai Chengyun stone produced in Huidong County, Sichuan Province, lead-zinc ore oxidation zone, and its symbiotic iron hydroxide and hydrous mica clay minerals, the main mineral deposits are galena, sphalerite, pyrite Ore and a small amount of chalcopyrite, etc. Cai Cheng marble is gray, fibrous, hair-like, with a glass luster, a density of 220g / cm3, hardness of 1.5 ~ 2.0, easily soluble in water under a microscope Colorless, non-polychromatic, measured at a temperature of 2 ℃ 3 optical axis parameters Ng = 1.4880, Nm = 1.4775, Np = 1.756; using conventional chemical methods Analysis of Cai Cheng Yun’s chemical composition, the mass fraction of its components were: FeO, 16.51%; Al2 O3, 7.90%; SO3,33 .96%; H2 O +, 37.64%; H2 O-, 3.56% ; Insolubles, 0.32%. When the atomic number of S is 1, the chemical formula of Cairngengstonite is calculated to be Fe2 + 3Al2 (SO4) .30H2O. The strong X-ray results of Cai Chengyun stone are: 5.494 2 1), 4.886 (1 0 0, 1 31), 4.0 30 (9,0 60), 3 .776 (2 1, 1 2 4), 3.50 4 (9,1 1 5), 3.2 52 (1 3, 0 36), 2 .72 7 (1 2, 2 0 5) and 1 .863 (8,2 2 9) belong to the monoclinic system with unit cell parameters a = 0.763 nm and b = 2 .41 3nm, c = 2 .264nm, β = 1 1 1 .0 6 °, Z = 4.