台湾花莲软玉的组构及振动光谱特征

以台湾花莲地区所产的绿色软玉为研究对象,利用电子探针(EPMA)、X射线粉晶衍射(XRD)、傅立叶变换红外光谱(FTIR)、激光拉曼光谱(RAMAN)等分析测试方法,对绿色软玉的物相、组构及振动光谱特征进行了研究。结果表明,该绿色软玉的主要矿物成分为透闪石,含少量的铬铁矿以及含Cr 钙铝榴石。软玉以纤维交织变晶结构为主,部分透闪石纤维体沿其片理方向定向排列,偶见铬铁矿骸晶及交代假像结构。对花莲绿色软玉的红外吸收光谱及拉曼光谱进行了表征,并对其振动光谱的归属作了探讨。

Microstructure and vibration spectrum study of nephrite from Taiwan

The composition, structure and vibration spectrum of nephrite in Fengtien district of Taiwan were studied by using such means as electron microrobe analysis (EPMA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and laser Raman spectroscopy. The results show that the main mineral composition of this nepheite is tremolite with minor chromite and essonite (Cr). The interwoven fibrous-crystalloblastic texture is the main microstructure, with some tremolite fibers assuming orientational arrangement in the direction of schistosity. Occasionally there exist malcrystals of chromite and pseudomorph of metasomatism. This paper also gives the information on the infrared absorption spectra and Raman spectrum of the nepheite and the category of its vibrational spectrum.