摘要:
采用傅立叶变换红外吸收光谱、X射线粉晶衍射和扫描电子显微镜对四川蛇纹石猫眼进行了研究。结果表明,四川蛇纹石猫眼的主要组成矿物为纤蛇纹石,具有斜纤蛇纹石d202,006=0.2446nm(I/I0=29)和d202,006=0.2451nm(I/I0=27)X射线粉晶衍射的特征谱线;在960~1100cm-1间红外图谱分裂成3个明显的谱带,570cm-1附近的红外谱带以肩状出现,在3600~3690cm-1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,具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层为圆柱状、外层为多角形的"内圆外方"的结构模式。
Abstract:
Serpentine cat's-eye from Sichuan Province are studied by FTIR, XRD and SEM. The results indicate that the serpentine cat's-eye mainly consists of chrysotiles, which show the characteristic diffraction lines d202, 006=0.244 6 nm (I/I0=29) and d202, 006=0.245 1 nm (I/I0=27) in the XRD pattern; two absorption bands near 3 600~ 690 cm-1 and three characteristic IR absorption bands around 960~1 100 cm-1and one weak shoulder absorption band in the IR patterns. The fibers of chrysotile have two types: one with good tenacity, clear and smooth appearance, without corrosion spots; the other with poor tenacity and corrosion spots in their internal structure. At the cross section, the fibers of chrysotile show the special microstructure: the core is round, the outer layers are irregular-shaped multiangular.
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