李洲坳东周墓出土玉器的红外光谱和X射线粉晶衍射特征

The characteristics on infrared spectrometer and X-ray diffraction of jade excavated from eastern Zhou Tomb of Lizhouao site

通过对李洲坳东周墓出土玉器进行傅里叶变换红外光谱(FTIR)、X射线粉晶衍射(XRD)分析,结果表明:红外光谱显示所测4件样品均为透闪石质软玉;X射线衍射分析显示样品G47∶3和G36∶1由较纯的透闪石组成,G21∶1和G21∶2主要矿物为透闪石,但是出现高岭石矿物的峰,表示其受沁后,出现黏土化。

The jade excavated from Lizhuoao site has been studied by FTIR and XRD.The results of FTIR indicate that the four pieces of jade excavated are all belong to nephrites with treolites.The results of XRD analysis are as follows：G47∶3 and G36∶1 consist of pure tremolite;G21∶1 and G21∶2 consist of tremolite,but with the peak of kaolinite.What’s more,G21∶1 and G21∶2 contain little amount of kaolinite,which maybe the result of weathering process.