镜煤与丝炭结构的X射线衍射初步分析

通过X射线衍射（XRD）分析对4个不同矿区煤中的镜煤和丝炭中矿物质类型和相对含量、煤中有机质的结构特征进行了对比分析。根据衍射图谱确定了样品中的主要矿物质成分为高岭石、黄铁矿、石英、方解石等。丝炭中的矿物质含量高于镜煤。对8个样品的结构参数进行了计算，结果表明，丝炭芳香层片的定向程度和聚合程度高于镜煤，陆相环境条件下形成的煤，其镜煤与丝炭的d002面网间距较小，Lc和La较大。

Analysis of Structure Between Vitrain and Fusain X-Ray Diffraction Analysis

The type and the content of minerals and the structural characteristics of organic matter of the vitrain and the fusain in several coals from four different mine areas were compared by the means of X ray diffraction(XRD). According to the X ray diffraction spectra,kaolinite,pyrite,quartz,calcite are determined as the main minerals. But the content of minerals in the fusain is higher than in the vitrain. At the same time structural parameters of eight samples are calculated. The result shows that the degrees of molecule orientation and polymerization of the aromatic layer of the fusain is higher than those of the vitrain. For the coals formed under terresrial face condition, their vitrain and fusain have smaller layer distance ( d 002 ) and larger L c, L a.