四川蛇纹石猫眼的矿物组成及显微形貌研究  

Study on the composition and microstructure of serpentine cat's eye from Sichuan province,southwest of China

作　　者：卢保奇[1] 亓利剑[2] 夏义本[1] 翁臻培[1] 

机构地区：[1]上海大学材料学院宝石工艺与技术专业,上海201800 [2]中国地质大学珠宝学院,武汉430074

出　　处：《超硬材料工程》2006年第3期56-58,61,共4页Superhard Material Engineering

基　　金：国家自然科学基金(49772096)资助项目

摘　　要：采用傅里叶变换红外吸收光谱(FT IR)、X射线粉晶衍射(XRD)和扫描电子显微镜(SEM)分析方法对四川蛇纹石猫眼进行了研究。结果表明:四川蛇纹石猫眼主要组成矿物为纤蛇纹石,具有纤蛇纹石d202、006=0.2446nm(I/I0=29)和d202、006=0.2441nm(I/I0=27)X射线粉晶衍射的特征谱线。在960~1100cm-1间的红外谱图分裂成三个明显的谱带,570cm-1附近的红外谱带以肩状出现,3600~3690cm-1间的高频区出现两个谱带。蛇纹石纤维形态分为两类:一类是纤维韧性好,外表光滑干净,未见明显的溶蚀现象;另一类纤维平直,韧性差,外表粘有一些杂质,见有较明显的溶蚀现象。在垂直纤维方向上,蛇纹石纤维表现出内核为圆柱状、外壳为多角形的“内园外方”的结构模式。FTIR 、XRD and SEM were used to study serpentine cat's eye from Sichuan province in this paper.The results indicate that the serpentine cat's eye mainly consists of chrysotile,which shows the characteristic reflection lines d_(202、006)=0.2446nm(I/I_0=29) and d_(202、006)=0.2441nm(I/I_0=27) in the XRD pattern,two absorption bands near 3600～3690cm^(-1) and three characteristic IR absorption bands around 960~1100cm^(-1) and one weak shoulder absorption band in the IR patterns.The fibers of chrysotile have two types: one with good tenacity,clear and smooth appearance as well as no flux spots;the other bad in tenacity,with the impurities and flux spots in their internal structure.At the cross section,the fibers of chrysotile present the special microstructure: the core is round with the irregular-shaped multiangular outer layers.

关 键 词：蛇纹石猫眼 矿物组成 纤蛇纹石 红外吸收光谱 扫描电子显微镜 

分 类 号：P575[天文地球—矿物学]