安徽官山两种坡缕石粘土的成分与红外吸收谱

COMPOSITIONS AND INFRARED SPECTRA OF TWO KINDS OF GUANSHAN PALYGORSKITE CLAY

本文采用多种成分分析手段对官山两种不同颜色坡缕石全粘土进行了研究。全粘土湿化学分析扣除SiO2 含量计算得到的坡缕石阳离子数与电子探针获得的阳离子数一致。配位八面体阳离子计算表明 ,粉红色坡缕石为三八面体矿物 ,灰白色坡缕石是介于三八面体矿物和二八面体矿物间的中间类型。X射线粉末衍射的K值法对全粘土矿物定量分析有着较高的精度 ,同时用电子探针波谱可准确测定坡缕石粘土的成分。官山两种不同颜色含坡缕石的全粘土红外吸收谱能反映其中坡缕石的吸收谱特征。对X射线光电子能谱研究表明两种不同颜色的坡缕石中的铁主要是Fe3+,这与全岩湿化学分析的结果是一致的 ,同时也还可以作为电子探针成分分析的补充。

The XRD, IR, XPS are employed to study two kinds of Guanshan palygorskite clays in this paper. Quartz contents were calculated on the basis of quantity X-ray powder diffraction patterns of Guanshan paligorskite clays. Based on the results of bulk chemical analyses of quartz, the octahedral compositions were calculated from three octahedral positions for one-half of the unit cell. The results show that the palygorskite in pink clay is trioctahedral and in gray clay is dioctahedral. The consistency of bulk chemical analyses and electron microscope analyses indicates that electron microscope analyses could be employed to analyze the composition of palygorskite clays. Infrared absorption spectra of palygorskite clays reflect the spectral character of the palygorskite. XPS can be employed to identify the valence of iron.